问题补充:
to prepare for the olympics games in summer,london __its largest ever exercise to test the response for emergency services.A.planned B.is planning C.had planned D.
答案:
为了准备夏季奥运会,伦敦准备举行一场有史以来最大的演练,来检验应急服务响应.
这题目有点过时了,选B,用现在进行时表将来.
======以下答案可供参考======
供参考答案1:
B.is planning