用所给单词的正确形式填空 Tom asked his mother if water _____(freeze) at 0℃.

问题描述:

用所给单词的正确形式填空 Tom asked his mother if water _____(freeze) at 0℃.

freeze 因为永远都不会变的东西,例如太阳从东边升起之类的,即便主句是过去式,从句依然是一般现在时