The next Olympic Games will be held in Manchester in 2012, ______ which time the city will have changed a great deal.
A.at
B.after
C.by
D.during

A.A.at
B.after
C.by
D.during

【参考答案】

C
解析：用by引导时间状语，表示到未来某时某事将会发生时，谓语用将来完成时。例如：I will have ma......

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