题目内容
He ________ full marks, but he was so careless as to make a spelling mistake.
[ ]
A.must have gained
B.can have gained
C.could have gained
D.must gain
答案:C
练习册系列答案
相关题目
题目内容
He ________ full marks, but he was so careless as to make a spelling mistake.
A.must have gained
B.can have gained
C.could have gained
D.must gain