Was your cousin born the evening 31st of January?-Yes!A. in, onB. at, ofC. on, ofD. o

Was your cousin born the evening 31st of January? ---Yes!
A. in, on
B. at, of
C. on, of
D. of, in

A. in, onB. at, of(答案→)C. on, ofD. of, in解析：原句意思是：你的表姐妹（兄弟）是元月三十一日晚出生的吗？是的。选项中in, on, at都是“在”的意思，of是“……的”，在表示时间时in指“在某年、月、季节”, on表示“在某日、星期几或某天的上午、下午、晚上等”, at表示“在几点几分”。在“元月三十一日晚”，应该是on，故选C。

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