C．if                              D．for

12、It’s a long time       we met last.

A．so            B．after         C．since        D．before

13、That maths problem is       difficult      nobody can do it.

A．too…to                                       B．very…that       

C．so…that                                      D．very …but

14、I’ll give her the message       she comes back.

A．since                  B．before       

C．until                  D．as soon as

15、       the teacher came into the classroom, many students were talking to each other.

A．While                  B．If   

C．Since                  D．When

16、People often mistake us for each other      we are twins.

A．if                              B．when         

C．because                         D．after

17、Could you tell me       in your home town in winter?

A．if it often snowed              B．whether does it often snow

C．if it often snow                D．whether it often snows

18、Are you sure        Mr. Li will come to your birthday party?

A．if                              B．that                            C．for                             D．when

19、      Lily      Lucy like singing.

A．Either…or                      B．Beither…nor  …

C．Both…and                       D．So…that

20、Read the sentences slowly       we can understand what you read.

A．so that                         B．before                          C．until                           D．because

二.答案

  1、D     2、A     3、A     4、D     5、C     6、A     7、B              8、B     9、B     10、A         11、B    12、C    13、C    14、D   

15、D    16、C    17、D    18、B    19、C    20、A