第二部分 英语知识运用（共两节，满分45分）
第一节 单项填空（共15小题：每小题1分，满分15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。
21. —Would you mind if I opened the window?
—______. In fact, I was going to suggest you ______ it.
A. Yes; not did B. Not at all; do C. More or less; did D. Of course; do
22. The most common thing to do on earth, such as walking and eating, can be ______ big threat if not handled properly in ______ space.
A．a；不填 B．不填；不填 C．a；the D．不填；the
