—Listen! There is a knock on the door. Who _____ it be?—It must be Jack. Just now I sent for him.
--- What is the date today? --- It's _________.
She knows a lot about China as she has been to China ________.
--- May I help you, sir? --- Yes, I bought the TV the day before yesterday, but it ______.
______ the bus until it ______..
The 70-year-old man ______ exercises in the morning.