— Can I pay the bill by check?— Sorry, sir. According to the rules of our hotel, the payment ______ be made in cash.

—Must I water the flowers now?  —No, you ________ . You __________ do it later.

—Look! It________be the new woman manager. —It________be her.She has just left for Shanghai. 

---Who is the tallest boy?      ---It ______ be John.. John is of medium height.

.--Your parents were anxious about you. You _____ home without saying a word. -- It’s my fault.