2. I’ll lend you the book ________ I can remember who has borrowed it.

　 　　　　　A. if only　　　 B. only if　　　　　 C. even if　　　　 D. as if

1. While doing shopping, people sometimes can’t help ______into buying something they don’t really want.

A. persuade　 　　　　　　　　B. persuading　

C. being persuaded　 　　　　　D. to be persuaded

15. There’s about 400mm rain fall in this area a year _____

A. on average　 B. in average　 C. of average　 D. for average

14. You must officially ____ any course you are not attending.

A. fall　 B. drop　　 C. learn　　 D. join

13. Do be careful next time, _____?

A. will you　 　B. do you　　 C. don’t you　　 D. aren’t you