The government has taken measures air quality.
| A．to improve | B．improved | C．being improved | D．to be improved |
You have no idea how she finished the relay race __ her foot wounded so much．
| A．for | B．when  |
C．with | D．while |
The whole family were worried about Jane because no one was aware ___she had gone．
| A．that where | B．of the place which |
| C．of what | D．of where |
By the time he realizes he _____ into a trap, it'll be late for him to do anything about it．
| A．walks | B．walked | C．has walked | D．had walked |
—Shall I keep an eye on your house when you are on holiday?
—.
| A．It's up to you | B．Of course you should |
| C．If you should like | D．I would appreciate that． |
An accident happened at______ crossroads a few metres away from ____bank．
| A．a…a | B．/…a | C．/…the | D．the…/ |