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的最佳答案，并在答题卡上将该项涂黑。
21. The scientists got as _______ as they could to the wild animals so as to watch them_______.
A. closely; close B. close; closely
C. close; close D. closely; closely
22. You’d better have your room _____. It’s _______.
A. clean ;in mess B. cleaned ; a mess
C. cleaned ; in mess D. clean ; in a mess
