The 30th Olympic Games will be held in London .A. atB. onC. inD. for

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。