_____ the government recovers the vehicle purchase tax and the oil prices go up continuously, the sales of the vehicle in China are still increasing every year.
| A．When | B．Once | C．Since | D．While |
So hard-working _____ that he sets a good example to all the other classmates．
| A．he is | B．is he | C．does he | D．he does |
With more and more forests _____, many animals are facing the danger of dying out．
| A．to destroy | B．destroying |
| C．destroyed | D．to be destoyed |
As we all know, China is a developing country, _____ attracting more and more foreigners．
| A．the one | B．one | C．it | D．that |
The beautiful town, _____ we spent our summer vacation last year , lies at the foot of a mountain．
| A．whose | B．which | C．where | D．why |
—It’s such a beautiful day． Why not have a picnic with us?
—_____． But I have a lot of homework to do．
| A．Don’t mention it | B．It’s up to you |
| C．I have no time | D．I’d love to |