1.—What bad weather! I'm afraid the trip will be canceled. 

—____it would clear up tomorrow.

A. Even if                                 B. If only                                 C. Only if                                 D. As if

2.It's hard to imagine what a bad effect the violent TV show has _________ the children.           

A. in                                       B. on                                       C. for                                       D. with

3.Many students stay up late into the night, some of whom       during the boring lecture.           

A. drop off                           B. drop in                           C. get away                           D. drop out