He looks very tired.He ____to bed too late last night.A.must goB.must have goneC.could goD.didn't go

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He looks very tired.He ____to bed too late last night.A.must goB.must have goneC.could goD.didn't go
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He looks very tired.He ____to bed too late last night.A.must goB.must have goneC.could goD.didn't go
He looks very tired.He ____to bed too late last night.
A.must go
B.must have gone
C.could go
D.didn't go

He looks very tired.He ____to bed too late last night.A.must goB.must have goneC.could goD.didn't go
B
last night 是过去式
句子是对过去式的判断.用情态动词+have+ved.
所以,选B