―It's clever you to help me work out the difficult maths problem. Thanks!

―You are welcome. Now it's easier you to understand it.

A. of; of B. of; for C. for; of D. for; for

B 【解析】 试题句意： 你真聪明，帮我解出了这道数学难题。谢谢你！——不必客气。现在你更容易理解它。本题考查的句型是it is +adj.+ of/for sb. to do sth. 对某人来说做某事是……的。当形容词是指人的品质方面的，应该用of，如果形容词是修饰后面的动词不定式，就用for，故答案为B。

This kind of bamboo can be used a fishing pole(竿).

A. for B. as C. to D. by

B 【解析】句意：这种竹子能被用作鱼竿。be used as被用作是……，故选B。

—I can't stop smoking, doctor.

一For your health, I'm afraid you .

A. must B. can C. have to D. need

C 【解析】句意：——医生，我戒不了烟。——为了你的健康，恐怕你必须戒烟。must必须，表示主观上的要求；can可以，表示允许；have to不得不，表示客观上的要求；need需要，表示必要性。根据For your health,可知为了健康而戒烟，这是客观上的要求，故用have to，故选C。

We students can collect food and old clothes for the homeless people, and the teachers can ________learning skills for the poor children.

A. give B. offer C. prevent D. provide

D 【解析】试题句意：我们学生可以为无家可归的人收集食物和旧衣服，老师可以为贫困儿童提供学习技能。A. give给；B. offer 提供；C. prevent阻止；D. provide提供。provide sth. for sb. 向某人提供某物。结合句意可知，答案为D。

People running everywhere. Do you know what ?

A. see; has happened B. see; happens

C. are seen; is happening D. are seen; is happened

C 【解析】句意：到处可见人们奔跑。你知道正在发生什么事吗？结合句意，主语people与谓语see之间是被动关系，故用被动语态，故排除AB两项。happen表示“发生”，没有被动形式。根据running可知此处表示正在发生什么事，故用现在进行时be doing，故选C。

After a short rest, the doctor carried on the next patient

A. operating B. operation on

C. do an operation on D. operating on

D 【解析】句意：短暂休息一段时间后，那位医生继续为下一位病人做手术。operate on=do an operation on“给……做手术”，carry on doing sth继续做某事，故选D。

I find difficult us to work out the math problems.

A. its; of B. its; for

C. it's; of D. it; for

D 【解析】句意：我认为我们很难做出那些数学难题。根据句型find it difficult for sb to do sth“认为某人做某事是很难的”，it是形式主语，to do sth是真正主语，故选D。

—Oh dear! How can I clean the classroom in just 10 minutes?

—Don't worry. . We can give you a helping hand.

A. Every dog has its day B. Practice makes perfect

C. A friend in need is a friend indeed D. Many hands make light work

D 【解析】句意：——哦，天哪！我怎么能在只有10分钟内打扫完教室呢？——不要担心。众人拾柴火焰高。我们能给你一个帮助。Every dog has its day风水轮流转；Practice makes perfect孰能生巧；A friend in need is a friend indeed 患难见真情；Many hands make light work众人拾柴火焰高；根据We ca...

—Please don't speak in such a low voice. My grandfather is a little .

—Sorry, I .

A. blind; will B. disabled; won't

C. deaf; won't D. worried; will

C 【解析】句意：——请不要用这么低的声音说话。我的祖父有点聋。——对不起，我不会了。blind瞎的；disabled残疾的；deaf聋的；worried担心的。根据Please don't speak in such a low voice.可知此处表示你说话声音小，我的祖父会听不见，因此我的祖父有点聋，故选C。

Volunteers often ________ the leaflets to people in the streets.

A. hand out B. put out C. run out D. come out

A 【解析】句意：志愿者经常在街上给人们分发传单。A. hand out分发，发放；B. put out扑灭，熄灭；C. run out用完，用尽；D. come out出来，出版，发行。志愿者在街道上义务分发传单。故选Ａ。