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. The notice came around two in the afternoon ____ the meeting would be postponed.
A. when B. that C. whether D. How
22. Much disappointed as he is _______ in the job interview, he still keeps his confidence.
A. failed B. to have failed C. having failed D. Failing
23. _________ many countries in Latin America have been trying to reduce gaps in income, America has allowed
