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）
从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. It has been a long that the Spring Festival is a time for family
reunion in China.
A. intelligence B. habit C. tradition D. system
22. Whether the wounded ________ sent to the hospital _______ unknown.
A.has been; is B.have been; are
C.were; are D.have been; is
