第二部分：知识运用（共两节，45分）
第一节 单项填空（共15小题：每小题1分，共15分）
从每题所给的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. Rather than going into _______ office, a lot of people are connected to ______ Internet and now work from home.
A. /, the B. an, an C. the, an D. an, the
22. Although there were lots of difficulties________, I never let my problems defeat me.
A. to overcome B. to have overcome C. overcoming D. overcome
23. In China, Some people are quite well-off____________ some live in terrible conditions, especially in remote areas.
A . though B. as C. while D. when
24. ----Why couldn’t you tell me how you felt about things?
----That’s because I grew up in a family _________ we didn’t talk about feelings.
A. where B. which C. when D. why
