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They __________ where to build the new hospital before the w

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They __________ where to build the new hospital before the work began.
a,have been decide B ,had decided c,had been decide D ,will be decided 为什么选b?
They __________ where to build the new hospital before the w
had done...过去的过去,过去完成时.
before你看到了吗,before the work began...这里的began已经是过去式了.
那么在动工之前发生的动作是不是要用过去完成时呢?
before引导时间状语从句,从句用过去式,主句用过去完成时.
They __________ where to build the new hospital before the w 把句子改复合句,They haven't decided where to build the new hospital 两道英语句型变换题.They haven't decided where to build the new hospit 11.When and where to build the new factory When and where to build the new bridge (has n When and where to build the new power station_ yet. When and where to build the new factory ____ yet. when and where to build the new factory__yet 彭翔翻译:after much delay,the plan to build the new hospital fin when and where to build the new factory___yet when and where when and where to build a new park in the city .to be disscu 英语单选题：When and where to build the new factory ______ yet?