- 试题详情及答案解析
- I _________ have written to him because he phoned me shortly afterwards.
| A．ought to | B．must |
| C．couldnt | D．neednt |
- 答案：D
- 试题分析：考查情态动词和虚拟语气。句意：我本不需要给他写信，因为我刚写完信不久他就给我打电话了。情态动词+have done可表示对过去事情的推测，must have done一定已经做了某事；can't have done不可能已经做了某事；should have done本应该做某事；needn't have done本不需要做某事，根据句意可知，这里是“本不需要”的意思，故选D。
考点：考查情态动词和虚拟语气