20.This dress still looks pretty on you , ______ it is out of style.

　 A. though　　 B. but　　 C. since　　 D. if

18. You’ll do much better ______ you’re more careful with your spelling.

　 A. if　　　　 B. before　 C. although　　 D. unless

17. I had invited everybody , ______ only two people came to ma party.

　 A. or　　　　 B. but　　　 C. and　　 D. so

16.-There are many pictures in the book.

　 -Great! _____ it will be hard for young children to read.

　 A. and　　 B. So　　　 C. But　　

15.-You saw the film Harry Potter last night,didn’t you?

　 -Yes, _____ I missed the beginning.

　 A. and　　　 B. so　　　 C. but　　 D. then

14.Take more exercise, _____you’ll be healthier.

　 A. and　 B. or　 C. but　　 D. then

13.-It’s a long story, _____you can hardly find any new words in it.

　 -Good! _____it will be too hard for children.

　 A. so, Then　 B. and, Or　 C. but, Or　 D. though, And

12.It was snowing hard _____ we had to stay at home and watch TV.

　 A. that　 B. so　　 .C. but　　 D. because

11.-Would you like to play basketball with us?

　 -Yes, I’d love to. _____I’m afraid I have no time.

　 A. So　　 B. But　　 C. Or　　 D. And

10. _____our football team failed in the match, we tried our best.

　 A.AS　　　 B. Though　 　C. Because