Look at your dirty hands. You should go and w...

Look at your dirty hands. You should go and wash your hands ________ you have lunch.

A. after　　 B. before

C. while　　 D. although

九年级英语单选题中等难度题查看答案及解析

Jack, 　　 dirty your hands are! Go and wash them.

A.how B.what C.what a D.how a

九年级英语单选题中等难度题查看答案及解析

Jack, 　　 dirty your hands are! Go and wash them quickly.

A. how　　 B. what　　 C. what a　　 D. how a

九年级英语单选题简单题查看答案及解析

Bruce, look at your dirty shoes. You’d better ________them right now.　

九年级英语单项填空简单题查看答案及解析

Look closely at your hands. Are they clean? It doesn't matter how many times you wash your hands, tiny microbes (微生物) still stay on them. But don't worry. Most microbes don't harm you.

Now scientists say the microbes on our hands could be used in a surprising way; fighting crime, According to a recent survey microbes as well as fingerprints(指纹) could be used to indentify the criminal.

Everyone has his own set of microbes on the hands. That is to say, if you and your best friend were able to see and compare all the microbes on your hands, your hands probably would look different. Some microbes only show up on your hands while others live only on your friend's hands.

When you work on a computer you leave the microbes from your hands on the keyboard. The scientists can easily tell the owner of the keyboard by looking at the microbes on it. Even if you don't leave your fingerprints behind, your microbes may give you away.

Noah Fierer, a scientist, says. "You can only clean a fingerprint, but you can't sterilize (使无菌) a surface just by wiping(擦) it off," He says that scientists have a lot more work to do before the microbe is used as a useful tool.

1.According to the passage,_______ could be used to identify the criminal.

A. fingerprints    B. scientists' hands

C. microbes        D. fingerprints and microbes on people's hands

2.Paragraph 3 tells us that________.

A. our hands look similar             B. the microbes will make the keyboard dirty.

C. we should compare hands often     D. we have our own sets of microbes.

3.When you work on computer, the microbes________.

A. just stay on our hands B. also stay on the keyboard

C. will do harm to you D. will disappear

4.From Noah Fierer we know that________.

A. fingerprints are no longer useful in fighting crime

B. microbes can be found on everyone's hands.

C. unlike microbe fingerprints can be cleaned if people wipe them

D. the microbe is used as a useful tool

5.What’s the best title of the passage?

A. Microbes May Tell Who You Are               B. Scientists Say Everyone Has Microbes

C. Noah Fiercer Does Research Into Microbes    D. Fingerprints Help Catch Criminals

九年级英语阅读理解中等难度题查看答案及解析

—Look at your hands, John. ______ of them is clean.

—OK, I’ll wash them at once.

A．Neither           B．None             C．Both             D．Either

九年级英语单项填空中等难度题查看答案及解析

—The fish 　　　　　 delicious. Mom, can I have some?

—Yes, of course. But you should wash your hands first.

A.tastes　　　　　　 B. smells　　　　　　 C. sounds　　　　　　 D. feels

九年级英语单项填空中等难度题查看答案及解析

—The fish________delicious. Mum, can I have some?

—Yes, of course. But you should wash your hands first.

A.smells B.tastes C.sounds D.feels

九年级英语单选题困难题查看答案及解析

做饭前你应该洗手，以防感染传染病。

You should wash your hands when preparing food to________________________infection.

九年级英语完成句子中等难度题查看答案及解析

做饭前你应该洗手，以防感染传染病。

You should wash your hands before preparing food to ___________________________spreading infection.

九年级英语完成句子中等难度题查看答案及解析