— Is it good to look up every new word when I come across it in reading?—No，you ，because y

— Is it good to look up every new word when I come across it in reading?
—No，you ，because you are likely to guess the meaning from the context,
A. don't have to
B. shouldn't
C. can't
D. mustn't

(答案→)A. don't have to B. shouldn'tC. can'tD. mustn't解析：考查情态动词用法。Don’t have to不必；shouldn’t不应该；can’t不可能；mustn’t禁止，千万不能；句意：—当我在阅读的时候，查每一个生单词好吗？—你不必这样做。因为你可能从上下文中猜出这个词的意思的。根据句意说明A正确。

这个问题我还想问问老师呢