If we had paid enough attention to the issue of the heavily-overloaded vehicles, the tragedy of the collapse of an over

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1. If we had paid enough attention to the issue of the heavily-overloaded vehicles, the tragedy of the collapse of an overpass in Wuxi _____ avoided.

A . should B . could be C . should have been D . could have been

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外研版（2019）高中英语必修第一册Unit 1单元练习（2）