The light is out in her room. She to bed.A. can’t goB. can’t have goneC. must have goneD.

问题补充：

The light is out in her room. She to bed.

A. can’t go

B. can’t have gone

C. must have gone

D. has gone

答案：

A. can’t go

B. can’t have gone

(答案→)C. must have gone

D. has gone

解析：按题意，灯已经熄灭，所以选must have gone to bed（一定已经睡觉了）