题目内容
Tom is going _______ December, and she’s staying _____three weeks.
A.on, for | B.in, for | C.at, in | D.in, on |
B
在具体月份前用介词in,而在一段时间前用介词for,故选答案为B

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题目内容
A.on, for | B.in, for | C.at, in | D.in, on |