Where is your mother?— She has ______ to Sichuan on business. She has ______ there four times recently.

How could you be so rude as to walk in here in the middle of my class?—_____________

That T-shirt with Yao Ming’s picture on it ________ belong to David. He admires him a lot. —No, it ________ be his. He hates black color.

My parents _____eat junk food, because it’s bad for our health.

Have you seen my toy car, Bill?— It’s ______ my way, so I put it ________.