Unit 2　In the lab

典型例题

1.How many days       there by the time you left.

　　A .had you stayed   B. have you stayed 
　　C. did you stay     D. would you stay

本题应选A. by表示时间时意思为“到…为止”。谓语动词用完成时态，本题by后接过去时，所以主句的谓语动词用过去完成时态。

2. There will be a sports meeting in our school       the end of this month.

　　A. by        B. at       C. in         D. to

本题只有by和at可以和the end of构成词组，由于谓语动词没有用完成时态，故排除A,选择B。

3. Where         ? We have been looking for you everywhere.

　　A. have you been   B. are you 
　　C. had you been    D. will you be

, "where have you been"是说在此以前你去哪儿了？意思相当于where were you  just now? 与下文我一直（即在此以前）找你在时间上是一致的。说话时两个人已经在一起，所以B错。C项没有过去时间参照，且与下句时间不符。D项与下句时态不一致。本题应选A

4. The room        smoke and I had to go out for some fresh air.

　　A . was filled of    B . was full with   
　　C. was filled with  D. was full about

表示“充满了……”、“挤满了……”，要用be filled with或者是be full of,据此，只有C为正确答案。

5. Tom tried to make his parents      by making faces.

　　A. pleased   B. pleasing   C. please   D. to please

   本题应选A。本题容易被误认为make后省去to 的不定式而误选C.实际上，表示人的情感如惊奇、快乐、激动等，应该用过去分词，包括类似本题在动词make后做宾语补足语时，也都用过去分词形式。

6. After writing the letter, I had my brother     and post it.

　　A. go   B. to  go  C. going   D . went

用have 作为使役动词，表示叫某人做某事时，做宾语补足语的不定式省去to，即句型have sb. do sth.，所以选 A.

 7．After waiting for two days, we decided to leave        him.

　　A . except   B . besides   C.  without   D.  with

except:除了 …..  之外，没有。besides:除了……. 之外，还有。with 表示“带上某”，without 表示“不带某人” 本题应选C.