Jimmy didn’t notice his head teacher entering his bed room. He a phone call.A. answeredB.

问题补充：

Jimmy didn’t notice his head teacher entering his bed room. He a phone call.

A. answered

B. has answered

C. was answering

D. is answering

答案：

A. answered

B. has answered

(答案→)C. was answering

D. is answering

解析：本题考查时态的用法。根据上文的语境可知，Jimmy打电话是他的班主任进来的那个时刻，所以该空应该用过去进行时。）