21.A man cannot smile like a child，_____a child smiles with his eyes，while a man smiles with his lips alone.

A. so B. but C. and D. for

22.____ apple fell from the tree and hit him on ______ head.

A. An; the B. The; the C. An; / D. The; /

23. —— When did you last hear ______ Jay?

—— He phoned me this morning，and we agreed ______ a time and place to meet.

A. of， to B. about， with C. from， with D. from， on

24. Ten years ago the population of our village was that of theirs.

A. as twice large as B. twice as large as

C. twice as much as D. as twice much as

25.Although badly hurt in the accident，the driver was _____ able to make a phone call.

A. still B. even C. also D. ever

26. Make sure you've got the passports and tickets and _____ before you leave.

A. somethingB. anything C. everything D. nothing

27. —— Have you known Dr. Jackson for a long time?

—— Yes，since she ____ the Chinese Society.

A. has joined B. joins C. had joined D. joined

28. ——Do you know if Terry will go camping this weekend?

—— Terry?Never!She___ tents and fresh air!

A. has hated B. hated C. will hate D. hates

29. Teenagers their health because they play computer games too much.

A. have damaged B. are damaging C. damaged D. will damage

30. ____ in the fields on a March afternoon，he could feel the warmth of spring.

A. To walk. B. Walking C. Walked D. Having walked