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. Unjust ________ the punishment was, he accepted it without any complaint.
A. while B. as C. although D. when
22. In ancient Egypt, green represented hope and spring, ________ is the time of year ________ things in nature start to grow after a long winter.
A. when; which B. what; when C. which; when D. which; that
23. As you know, I have just returned from my holidays in Athens, where I ________ for a fortnight.
A. stayed B. had stayed C. would stay D. was staying
