鸡得禽流感的症状:english题目

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The fire spread the room quickly .but everyone_______come out. A.could B.was able to Tom was a diligent boy..he ____go to school though it was raining hard A.was able to B.could 表示能力时can有过去时么?

为什么!!!!

A can表示能力时没有过去时的

CAN表有能力且做到了,但BE ABLE TO 只表能力.