You look very tired. You late last night.A. needn’t sit upB. didn’t need to sit upC. shou

问题补充：

You look very tired. You late last night.

A. needn’t sit up

B. didn’t need to sit up

C. shouldn’t sit up

D. needn’t have sat up

答案：

A. needn’t sit up

B. didn’t need to sit up

C. shouldn’t sit up

(答案→)D. needn’t have sat up

解析：考查情态动词。根据句意及时间状语，故用情态动词 + have done，needn’t have done本没有必要做，选D。