情态动词选择题十道!急求!
问题描述：
情态动词选择题十道!急求!
答
( B )1.John must ________ back by then.A.is B.be C.comes D.return( C )2.-- Must we stay here unitl this evening?-- No,you ________.A.mustn’t B.can’t C.don’t have to D.don’t need ( D )3.-- Need I s...