问题
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
B: can have gained
C: could have gained
D: must gain
正确答案是：
同类题型
Tomorrow is Tom’s birthday.Have you got any idea ____ the party is to be held? [ ]
I can’t find my CDs. —_______you put them in that bag.
._____ you write so well—By reading and keeping diaries every day.
Now _______ you have to do is to admit your mistakes and immediately correct them.
Mary! If only we had less homework today!—_____We all need more relaxation.