’t know his address yesterday,otherwise I __________ him a visit

pecial school accepts all disabledstudents, _____ educational level and background．

Shall I tell Sally to come here now—- No, you __________. I’ve told her already. But tell her she ______ to finish her work tonight.

Excuse me, sir, visiting hours are over. You ___________ leave.-Pardon me, nurse. I didn’t hear the bell.

Are you willing to live on Mars one day— It sounds exciting,but it still worries me.