第二部分：英语语言知识运用（共两节，满分35分）
第一节：单项填空（共15小题，每小题1分，满分15分）
请认真阅读下面各题，从题中所给的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. He is in ______ charge of the company. That is to say, the company is in ______ charge of him.
A. the; / B. /; the C. the; the D. /; /
22. My father ____ smoke heavily, but now he doesn't smoke any more.
A. use to B. was used to C. used to D. was used
