You_______ play with the knife. You ______ hurt yourself.

—I wonder why Mr Green hasn't showed up at the meeting yet.—I'm not sure，but he________in a traffic jam driving here.

According to the rules, students ______ get grades not lower than 85% in any subject in order to get the scholarship.

--- Where are we to hold the conversation? --- We’ll go to a quiet place and no one _____ disturb us.

-Listen! Is Mary playing the piano in the room?  --No. It ________ be Mary. She has gone to Hong Kong.