单选题
You fail the English exam again. You______so hard this term.
A、
mustn" t have worked
B、
needn" t have worked
C、
can" t have worked
D、
shouldn" t have worked
【正确答案】
C
【答案解析】
[解析] 你英语考试又没有通过，你肯定这学期没有努力学习。Can’t have done，一定没有。
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