题目内容
30.They ______ be at home. You see, the door is locked from the outside.
A. can’t B. may C. must D. mustn’t
A
There’s no light on — they __________ be at home.
A. can’t B. mustn’t
C. needn’t D. shouldn’t
There’s no light on—they______be at home.
A.can’t B.mustn’t
C.needn’t D.shouldn’t
.They ______ be at home. You see, the door is locked from the outside.
---- There’s no light on. ---- They ________ be at home.
A. can’t B. mustn’t C. needn’t D. oughtn’t to