2. 外语
  3. It was essential that all the equipment______back before the factory went into operation.

It was essential that all the equipment______back before the factory went into operation.

admin2014-05-14  103
问题 It was essential that all the equipment______back before the factory went into operation.
选项 A、be sent
B、must be sent
C、were sent
D、would be sent
答案A
解析
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