He _______ have completed his work；otherwise, he wouldn’t be enjoying himself by the seaside.

—May I do the rest of the work tomorrow?—Yes, of course. You        finish it today.

－Thank you for your gift. －________________

-What’s your plan for the summer holidays?-I’ve no idea, but I’ ve decided _____ at home and have a good rest first. 

—Must I come back before supper, mum?—No, you        .