第二部分 英语知识运用（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，选出最佳选项，并在答题卡上将该项涂黑。
21. He is always helping people without expecting anything _______.
A. in advance B. in public C. in return D. in sight
22. He used to ______ his teaching when he was young.
A. devoting to B. being devoted to C. devote to D. be devoted to
23. There ______in the world ______China is a great country with a long history and rich culture.
A. are no doubts; that B. are not doubts; if
C. is no doubt; that D. is no doubt; if
