问题补充:
The 30th Olympic Games will be held in London .
A. at
B. on
C. in
D. for
答案:
A. at
B. on
(答案→)C. in
D. for
解析:介词辨析。在某一年用介词in. at 强调具体时间,on 用在具体某一天,for 后接时间段。故选C。
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