单选题
8.
—I wonder why Mary didn't come to the examination yesterday. —She______ since she had already passed it.
A、
didn't need to
B、
needn't take it
C、
needn't to
D、
needn't have taken it
【正确答案】
A
【答案解析】
didn’t need to(do sth)“不需要(做)……”，指过去没有做某事，也没有必要做。needn’t have done sth“没必要做”，表示已经做了，但没有必要做。
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