We can't complain that children are cheating in examinations ______ adults themselves have set such a bad role model for them to follow.
| A．because | B．unless | C．when | D．though |
No one hopes the two countries will be at ________ war, because ______ peace is what everyone wants.
| A．the; the | B．a; a | C．the; / | D．/; / |
---- Hello, John. I haven’t seen you since we were at university.
---- ________. It’s been a long time.
| A．That’s all right. | B．All right. | C．That’s right. | D．Right enough. |
I have kept that photo ______ I can see it every day, as it always reminds me of the happy days in New York.
| A．which | B．where | C．whether | D．when |
Experts say walking is one of the best ways for a person to _______ healthy.
| A．maintain | B．stay | C．live | D．preserve |
If you want to ________ a pleasant visit, find out as much as possible about the manners and customs of your host country.
| A．ensure | B．deserve | C．secure | D．serve |