2. 外语
  3. If the whole operation______beforehand, a great deal of time and money would have been lost.

If the whole operation______beforehand, a great deal of time and money would have been lost.

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问题 If the whole operation______beforehand, a great deal of time and money would have been lost.
选项 A、was not planned
B、has not been planned
C、had not been planned
D、were not planned
答案C
解析 If the whole operation had not been planned beforehand为虚拟条件过去时。
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