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问题: 1、He told us not to let our minds go to sleep and

1、He told us not to let our minds go to sleep and to ____ up if we ever thought he or the textbook was wrong.
A speak B wake 为什么选A 呢?
2、Our teacher said he hoped we would learn something from this ______.
A class B experience 为什么不用A

解答:

speak up 说出 wake up 醒来 意思是他让我们积极思考,如果认为课本有错的地方就说出来

我们老师说他希望我们可以从这个经历中学到什么 而experience作为经历的事时又是可是的(有作为经验时experience是不可数名词,就不能用this了)。