________important computers are to everybody in a modern city!
| A．What | B．How |
| C．What an | D．How an |
He didn’t tell us_________.
| A．if he will give us a lecture |
| B．whether he would go with you |
| C．when he was started |
| D．when he will arrive |
We’ll make laws______ our environment.
| A．protected | B．protecting |
| C．to protect | D．protect |
What are you going to do when you finish ______the room?
| A．to clean | B．cleaning |
| C．clean | D．cleaned |
My cousin was born in China, but ____in Australia.
| A．picked up | B．gave up |
| C．grew up | D．took up |