There’s no light on-they _______ be at home．

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.

A. can’t B. may C. must D. mustn’t

---- There’s no light on. ---- They ________ be at home.

A. can’t B. mustn’t C. needn’t D. oughtn’t to

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