题目内容
He _____ full marks, but he was so careless to make a spelling mistake.
[ ]
A.must have gained B.can have gained
C.could have gained D.must gain
答案:C
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题目内容
He _____ full marks, but he was so careless to make a spelling mistake.
[ ]
A.must have gained B.can have gained
C.could have gained D.must gain