高中英语必修4 Unit 3单元测试
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和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．The bell______ the end of the period rang, ______ our heated discussion.
A.indicating,interrupting B. indicated,interrupting
C.indicating;interrupted D.indicated;interrupted
22．When I got back home I saw a message pinned to the door____’’Sorry to miss you; will call later.’’
A. read B. reads C. to read D. reading
23．It’s a waste of time him. He is no longer in charge now.
A．asking B．to ask C．asked D．asks
