问题
选择题
The light is out in her room; she _____ to bed.
A．musthavegone
B．hadgone
C．mustbegoing
D．mustgo
答案
答案：A
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The light is out in her room; she _____ to bed.
A．musthavegone
B．hadgone
C．mustbegoing
D．mustgo
答案：A