- 试题详情及答案解析
- 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 |
- 答案：A
- 试题分析：考查时态。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。
考点：考查时态