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. It is well known that ______ nature has provided Shangri-la with endless natural treasures, making the land ______ happy home for the local people.
A. the; 不填 B. 不填; a C. the; a D. 不填; 不填
22. I always have so many things to____ when I come back to the company after a trip abroad.
A add to B contribute to C attend to D appeal to
