一. 单项选择（共15小题，每小题1分，计15分）
从A、B、C、D四个选项中选出一个可以填入句中空白处的最佳答案。
1. —You look very tired this morning. What did you do yesterday afternoon?
—I did Christmas shopping.
A. a lot of B. a few of C. a number of D. a piece of
2. If the question ______ incorrectly, _______ question will be given to you
A. is answered, other B. answers, other
C. is answered, another D. answers, another
