第二部分：英语知识应用（共两节，满分35分）
第一节：单项选择（共15小题；每小题1分，满分15分）
请仔细阅读下面各题，从题中所给的A、B、C、D四个选项中，选出最佳选项。
21．－Mike, it is your turn to guard the entrance this afternoon.
－ I was on duty yesterday.
A．Are you kidding? B．Why not?
C．I can’t agree more. D．Don’t mention it.
22．I haven’t got clear idea of what job he does, but now he is different
John Smith from what he was three years ago.
A．不填；a B．a; a C．a; 不填 D．the; 不填
