As far as we know, half of Canadian teenagers...

As far as we know, half of Canadian teenagers do not get enough sleep on school nights, _____?

高三英语单项填空困难题查看答案及解析

As far as we know, half of Canadian teenagers do not get enough sleep on school nights, _____?

A．do they                               B．don’t they

C．don’t you                            D．isn’t it

高三英语单项填空中等难度题查看答案及解析

Surveys of American teenagers find that about half of them do not get enough sleep on school nights. They get an average of 60 to 90 minutes less than experts say they need.

Experts say teens are biologically programmed to go to sleep later and wake up later than other age groups. Yet many schools start classes as early as seven in the morning.

As a result，many students go to class feeling like Danny，16 years old. He plays two sports，lacrosse and football. He is an active teen—except in the morning. DANNY：“Getting up in the morning is pretty terrible. I’m just very out of it and tired. And through first and second period I can hardly stay awake.”

Michael Breus，a clinical psychologist with a specialty in sleep disorders says：“These aren’t a bunch of lazy kids—although，you know，teenagers can of course be lazy. These are children whose biological rhythms，more times than not，are off.”Teens，he says，need to sleep eight to nine hours or even nine to ten hours a night. He says sleepy teens can experience a form of depression that could have big effects on their general well-being. It can affect not just their ability in the classroom but also on the sports field and on the road because any tired driver is dangerous，especially a teenager with a lack of experience.

So what can schools do about sleepy students？The psychologist says one thing they can do is start classes later in the morning.

Eric Peterson，head of St.George’s School in the northeastern state of Rhode Island，says，“In the end，schools ought to do what’s the right thing for their students，first and foremost.”And he wanted to see if a 30-minute delay would make a difference. It did.

1.According to the passage，which of the following is the chief cause of sleepy teenagers？

2.According to Michael Breus，________.

3.What is Eric Peterson’s opinion on the issue？

4.What does the underlined word“It”in the last sentence might refer to？

5.What can you infer might follow the passage immediately？

高三英语阅读理解中等难度题查看答案及解析

As far as I know, quite a few creatures in this film are not real at all, and a lot of ________ happens is imaginary.

A. what               　　     B. which

C. that                    　 D. where

高三英语单项填空中等难度题查看答案及解析

—What do you know about Bill Gates?

—As far as I know，when he was a child，he showed a________of interests in everything around him.

A．series　    B．variety

C．good deal　    D．large amount

高三英语单项填空中等难度题查看答案及解析

As we all know, 　　　　 , the pollution will get worse and worse.

A. not if carefully dealt with

B. until not carefully dealt with

C. if not carefully dealt with

D. when not carefully dealt with

高三英语单项填空中等难度题查看答案及解析

As we all know,________, the pollution will get worse and worse.

A. not if carefully dealt with

B. until not carefully dealt with

C. if not carefully dealt with

D. when not carefully dealt with

高三英语单项填空中等难度题查看答案及解析

As we get older, the fear of not having a good memory grows for many people. A lot of people48  that the loss of memory can be the sign of Alzheimer’s(老年痴呆症).

It is true that as we grow older we are more 49  to develop Alzheimer’s. But with a proper lifestyle that includes a balanced diet and exercise, one can stay mentally 50  into their old age.

There are many causes of memory loss that have nothing to do with Alzheimer’s. As researchers come 51  to understanding Alzheimer’s, the outlook(前景) is 52  for people with this illness. New treatments are becoming available. With improved diagnosis(诊断), medications and treatment, one day we may be able to 53  or even reverse (反转) memory loss as we age.

Memory loss is 54    a topic of concern for people. Having Alzheimer’s can lead to increased dependency on others. Not being able to manage basic daily    55 on your own or even not being able to recognize family members would be a serious hit to anyone. This is why many elderly people often have questions and concerns.

1.A. worry             B. guess             C. insist             D. suggest

2.A. eager           B. nervous                  C. likely              D. ready

3.A. healthy                 B. honest           C. brave                    D. kind

4.A. faster            B. slower            C. farther                   D. closer

5.A. reducing                B. ending           C. improving               D. waiting

6.A. make            B. take              C. prevent                 D. protect

7.A. also            B. still                C. ever              D. even

8.A. activities                B. news              C. meals             D. drinks

高三英语完型填空中等难度题查看答案及解析

7. ---________ do you think of the play we saw just now?

---Wonderful! But not as interesting as the one we saw last Saturday.

高三英语单项填空简单题查看答案及解析

As we all know, every minute, 　　　　　 full use of 　　　　　 our lessons, will do good to our students.

A.which makes; studying B.when made; to study

C.that is made; to study D.which is made; studying

高三英语单项填空困难题查看答案及解析