第一部分 英语知识运用（共两两节，满分50分）
第一节 语法和词汇知识（共20小题;每小题1分，满分20分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
1.—The moon cake is really delicious. Can I have another piece?
—________, since you are at your close friend’s home.
A. You can. B. Behave yourself C. Go ahead D. Do it yourself
2. _______ he had shut the window, Tom returned to check them carefully.
A. Making sure B. To make sure
C. Having made sure D. Make sure
