Question

【题目】He is really nervous. He ______back and forth all the night waiting for the results.

A. has been walking B. had walked

C. walked D. is walking

Answer 1

【答案】A

【解析】

试题分析：本句的时间状语是all the night整个晚上。句意：他真的很紧张，整个晚上她一直走来走去在等待结果。现在完成进行时表示动作的持续性和反复性。故A正确。