Bill won’t make any progress_____he studies harder than before.
| A．if | B．when | C．because | D．unless |
We can ________ with each other by e-mail with the help of the Internet nowadays.
| A．come up | B．take a walk |
| C．stay together | D．keep in touch |
Binhai RT-Mart Supermarket (大润发超市) has been open ________.
| A．a month ago | B．a month later |
| C．since a month ago | D．in a month |
You’d better stop ________ .You look too tired.
| A．work | B．working | C．to work | D．worked |
Zhalong ________ food and cover for a lot of wildlife.
| A．gives | B．offers | C．protects | D．provides |
Our teachers often advise us ________ carefully in class.
| A．listen | B．listening |
| C．to listen | D．listened |