—_________. Is this your pen? —Yes, it is.
| A．I am sorry | B．Excuse me |
| C．Hello | D．That’s right |
– Have you decided how to spend your next day off?
– Not yet. We ________ join the school volunteer project.
A. may B. should C. must
– What do you think of Lucy’s birthday party?
– ________. I hope I can have such a party too.
A. Wonderful B. Terrible C. Boring
This is Mr White’s ________ trip to Beijing. He has been there twice before.
A. first B. second C. third
– ________ do you hang out with your friends?
– About once a week.
A. How soon B. How often C. How long
We will have no water to drink _________ we don’t protect the earth.
A. until B. if C. unless