---What are those?
---________.
| A．This is a book | B．That’s a book |
| C．They’re books | D．Those are books |
It was amazing. Let’s find out what was the _______ of the accident.
| A．because | B．excuse |
| C．cause | D．reason |
Why not use stones to build our new house? A house built of stone does not catch fire as easily as ______ made of wood.
| A．one | B．it | C．this | D．that |
—I was told to cook for my mother on her birthday.
—What ______ great advice! Who gave you ______ advice?
| A．an; a | B．an; the |
| C．/; the | D．/; an |
—Can you tell me _________________?
—Since 1990.
| A．how long you’ve bought the MP3 |
| B．when you joined the Party |
| C．how long have you become a guitar player |
| D．how long you’ve lived in the town |
—Will you go back home to see your parents or your parents come here to spend the holiday with you in the Spring Festival?
—__________.
| A．No, I won’t |
| B．Yes, they will |
| C．It’s so noisy here |
| D．I’ll visit my parents, of course |