问题
选择题
—Is it good a 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．can’t
B．mustn’t
C．don’t have to
D．ought not to
答案
C
本题考查情态动词。don’t have to不必；mustn’t禁止、不允许。