The box has been moved. Someone here last night. A.must beB.must have beenC.wasD
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The box has been moved. Someone ________ here last night.
A.must be
B.must have been
C.was
D.must come
试题答案
B
The box has been moved. Someone ________ here last night.
A.must be
B.must have been
C.was
D.must come
B