271.Hey boy! Would you like to show me your __C____ hand?

A.the others B.the other C.other D.another

你的另外一只手，前面有了your了，所以后面不再加the了。

272.He replied, with a big smile, “Oh, you __D____ to worry about them.”

A.need B.needn’t C.not need D.don’t need

need这里是实义动词，后接动词不定式。当情态动词时，后接动词原形。

273.Tom’s pet dog __B___ for five days.

A.died B.has been dead C.has died D.was died

die为瞬间动词，不能和表示一段时间的时间状语连用，要用be dead，表示死的状态，且此句要用现在完成时。

274.Lots of doctors and nurses __A___ to the earthquake areas after the earthquake happened.

A.were sent B.sent C.are sent D.had sent

根据题意，此题要用一般过去式的被动语态。

275.--Your new car is very nice.

--___C____.

A.Much better than yours. B.Yes, of course, it’s very good.

C.It’s very kind of you to say so. D.No, you are totally wrong.

根据对话，选C。其它答案均不礼貌和委婉客气。

276.Detectives Kim __D___ on the case for 3 months before he finally got the clues and successfully solved it.

A.works B.worked C.has worked D.had worked

根据题意，本题要用过去完成时，故选D. 过去完成时表示在过去的某个时间点之前已经完成的动作。

277.The story book is as interesting as the comic strip. I like __C___ of them.

A.neither B.none C.both D.all

neither两者都不；none三者或以上都不；both两者都；all三者或以上都；根据题意，因为有趣，所以两者都喜欢。答案为C.

278.--I took away your umbrella by mistake yesterday. I’m sorry about that.

--___B____.

A. Well done! B.Never mind. C.Thank you! D.Of course.

Never mind。没关系。

279.Some students were too busy preparing for their tests to get enough ___A____.

A.sleep B.friend C.hobby D.activity

根据题意，因为太忙于准备考试而睡眠不足。

280.Very soon a nursing home ___D___ in our neighbourhood for the elderly living alone.

A.has set up B.will set up C.has been set up D.will be set up

根据题意，本题要用一般将来时的被动语态。