II.单项填空(共10小题;每小题1分,满分10分)
从A、B、C、D四个选项中,选出一个可以填入空白处的最佳选项。
21. Mom bought me ______ MP3 for my birthday present last Sunday.
A. the B. an C. a D. 不填
22. ---How long have you _______?
---5 years.
A. married B. got married C. married D. been married
23. The singer became famous in the early 1980s, ______ the classical music was better than pop music.
A. which B. when C. that D. where
24. I don’t think ______ possible to master a forei