You’d better ________ right after supper.

—I ________ speak English in class because I’m afraid of making mistakes. —Don’t be shy. Believe in yourself and everything will be OK. 

My car is covered with thick snow and now the engine simply ______ start.

---Listen! Is Kitty in the next room?  ---No, it ______ be Kitty. She has gone to Beijing.

— Mum, will you buy me the new iPad after the Entrance Examination?— I’m afraid I ________, dear. We are short of money now.