二、单项选择 （15小题，每小题1分，共15分）
从A、B、C、D四个选项中选出一份最佳答案，并将其标号填入题前括号内。
（   ）21.-When is Henry’s birthday party, Lynn?
          -The 18th ,  __      about there o’clock in the afternoon.
A. in           B. at          C. on         D. to
（   ）22.-What a nice MP5! Whose is it?
-It’s __       . My father bought it for me.
A. me           B. him        C. his         D. mine