My sister advised me that I _____ accept the invitation.

— I think the man over there must be Bob.— It _______ be him. He has gone to England.

“Mary looks hot and dry.” “So _____ you if you had so high a fever.”

They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.

---Must I hand in my homework now?---No,you__.You can hand it in tomorrow.