There is no night on. They _____ be at home. A can’t B mustn’t C needn’t D shouldn’t
How about the rest of us _____ a meeting after dinner?
The blackboard was wiped _____ .
The students are _____ to hand in the exercises before class.
Was it _____ yesterday evening _____ you met him?
Could you give us the reason why you didn't do as _____ ?