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. As we all know, _______ mankind has realized the walk in ______ space.

A. the; the B. /; the C. /; / D. the; /

22. Some students, hoping to get a high score, are _______ about the results of coming exam.

A. absurd B. guilty C. anxious D. puzzling

23. All cases ______ children are dealt with in a special children’s court.

A. concerned B. concerning C. concern D. to concern

24. His mother could do nothing but _______ for the doctor to arrive.

A. to wait B. waiting C. waited D. wait

25. — Do you know the reason why the Whites got divorced?

— No, they haven’t quarreled with each other since they got married. _______, they broke up finally.

A. Somehow B. Anyhow C. Anyway D. Somewhat

26. If you live near the lake, ____ are that you will hear birds singing to welcome the new day.

A. possibilities B. situations C. chances D. opportunities

27. In such hot weather, the new plant will have to be protected from the sun if they ______.

A. are surviving B. survives C. are to survive D. have survived

28. The reason ______ most Chinese have healthy white teeth is ______ they eat a healthy diet.

A. why; that B. why; because C. that; that D. for; that