—Do you know the guy over there?—He’s a _____...

—Do you know the guy over there?

—He’s a ________ in our company, treating his members kindly.

A. cold fish　　 B. rotten apple

C. sly fox　　 D. top banana

高二英语单项填空中等难度题查看答案及解析

—Do you know the tall man ______ to Mr King over there?

—Sorry, I don’t know him.

A. to speak           B. speaking         C. is speaking          D. has spoken

高二英语单项填空中等难度题查看答案及解析

---Peter, where did you guys go for the summer vacation?

---We _______ busy with our work for months, so we went to the beach.

A. were                B. had been            C. have been            D. will be

高二英语单项填空中等难度题查看答案及解析

There are over 100 night clubs in the city, but you don’t often see________that is empty.

高二英语单项填空简单题查看答案及解析

Have you ever wondered why there are so many skin colors in the world? Do you know why people living in particular areas usually have a certain color? Biology and history are the two reasons for this.

Skin contains something called melanin, which determines a person’s skin color. The more melanin a person has, the darker his or her skin will be. The amount of and the production of melanin are controlled by genetics, but can be affected by other things, such as sunlight. If a person lives in a place with less sunlight, a person’s body will produce less melanin, making the skin lighter.

Skin color is also affected by another source ---- vitamin D. humans all need vitamin D to build bones. People can get it by eating foods such as fish and milk, or from sunlight, so sunlight absorbed by melanin cannot be used for vitamin D production. Therefore, a dark—skinned person will produce less vitamin D than a light—skinned person when they received the same amount of sunlight.

The connection between vitamin D production and skin color is clear when we look at evolution. The earliest humans lived in Africa, their dark skin produced less vitamin D because of their dark skin. As a result, their skin made less melanin, so they could get enough sunlight to produce vitamin D. their skin gradually got lighter and they lost hair. Now, people living in areas with strong sunlight like Africa, have darker skin, while people living in other areas have lighter skin. The exception to this is the Inuit, who live in a place with little sunlight, but have dark skin because they eat a lot of fish and have enough vitamin D.

Evolution has given us a rainbow of skin colors. Humans have always had melanin to determine our skin color. What has changed through history is the environment where we have lived. This has in turn changed our melanin production, and eventually, skin color.

高二英语其他题中等难度题查看答案及解析

Have you ever wondered why there are so many skin colors in the world? Do you know why people living in particular areas usually have a certain color? Biology and history are the two reasons for this.

Skin contains something called melanin, which determines a person’s skin color. The more melanin a person has, the darker his or her skin will be. The amount of and the production of melanin are controlled by genetics, but can be affected by other things, such as sunlight. If a person lives in a place with less sunlight, a person’s body will produce less melanin, making the skin lighter.

Skin color is also affected by another source ---- vitamin D. humans all need vitamin D to build bones. People can get it by eating foods such as fish and milk, or from sunlight, so sunlight absorbed by melanin cannot be used for vitamin D production. Therefore, a dark—skinned person will produce less vitamin D than a light—skinned person when they received the same amount of sunlight.

The connection between vitamin D production and skin color is clear when we look at evolution. The earliest humans lived in Africa, their dark skin produced less vitamin D because of their dark skin. As a result, their skin made less melanin, so they could get enough sunlight to produce vitamin D. their skin gradually got lighter and they lost hair. Now, people living in areas with strong sunlight like Africa, have darker skin, while people living in other areas have lighter skin. The exception to this is the Inuit, who live in a place with little sunlight, but have dark skin because they eat a lot of fish and have enough vitamin D.

Evolution has given us a rainbow of skin colors. Humans have always had melanin to determine our skin color. What has changed through history is the environment where we have lived. This has in turn changed our melanin production, and eventually, skin color.

高二英语阅读理解中等难度题查看答案及解析

There are so many things we do in our daily lives that have become a "habit".1.How you answer the phone is a habit. The way you sit in the car when you drive is a habit. Have you ever tried to change the way you do something, after you ve done it in a certain way for so long? It's not very easy to do. The minute your mind drifts to something else, you go right back to the old way of doing things.2.it's a way of doing things that has become routine or commonplace. To change an existing habit or form a new one can be a boring task.

Let's pick something fairly easy to start with, like spending 15 minutes in the morning reading a book. If you want to turn something into a habit that you do every day, you have to WANT to do it.3.Make a firm decision to do this on a daily basis.

Imprint it in your mind. Write several notes to yourself and put them in places where you will see them. By the alarm clock, on the bathroom mirror, on the refrigerator door, in your briefcase, and under your car keys are good places to start.

After the newness wears off, then you will have to remind yourself, "Hey, I forgot to..." Keep using the notes if you have to.4.Some people say it will take over a month to solidify it and make it something you will do without having to think about it. I tend to agree with the last statement. Two to three weeks will help you to remember, but thirty days or more will make it a part of your everyday routine.5.

A. What is a "habit" anyway?

B. Forming a bad habit is easy.

C. Brushing your teeth is a habit.

D. Is doing things in an old way good?

E. If you don't, you will find a way to do everything but that.

F. It takes 16 to 21 times of repeating a task to make it a habit.

G. that's something you won't necessarily have to think about before you do it—habit.

高二英语七选五中等难度题查看答案及解析

—I really don’t know when we can get over all the troubles.

— ______! Our troubles will soon be over.

A. Forget it          B. Cheer up     C. Neither do I      D. What a pity

高二英语单项填空困难题查看答案及解析

单词拼写

1.Our friendship has steadily ________________ (加强) over the years.

2.As we all know, smoking has a bad ____________ (影响) on health.

3.Sport has become an important form of entertainment, ______________ (吸引) to both men and women.

4.I am _____________ (反对的) to drunk driving.

5.I am ________________ (惭愧的) to say that I lied to her.

6.Q_____________ of water in the lake were polluted by the factory.

7.The boy intended to give the girl an apple in e____________ for a banana.

8.A teacher should not show p________________ for any one of his students.

9.They a______________ to climb the top of the mountain, but failed.

10.It was a long journey, but we e______________ arrived.

高二英语单词拼写中等难度题查看答案及解析

“Aren’t you in the Crack House Quartet?” a guy in a Hillary Clinton mask asked me, ___________ some hard-core band that Adam loved and I hated.

A.turning to B.backing out C.working out D.referring to

高二英语单项填空困难题查看答案及解析