问题 选择题

To prepare for the Olympic Games in summer, London ____ its largest ever exercise to test the response of emergency services.

A.planned

B.is planning

C.had planned

D.plans

答案

答案:B

考查时态。根据句意:为了准备今年夏天的奥运会,伦敦正在计划一个有史以来最大的锻炼来检查对紧急服务的回应。

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