- I hope to see Niagara Falls one day. What about going there?
- Niagara Falls would be beautiful, but there is not much to do there.
| A．sometimes | B．in the day |
| C．a day | D．some day |
Our teacher wants us ______ at school on Mondays.
| A．stay | B．to stay | C．staying | D．stayed |
Mary___________ computer science last year.
| A．studies | B．studied | C．will study | D．studying |
In ten years, John __________ an astronaut.
| A．will be | B．is | C．was | D．be |
According to the latest reports on TV and in the newspaper, food safety is becoming a ____________ serious worldwide problem.
| A．more and more | B．little by little | C．now and then | D．one by one |
Drugs can do great harm (危害) not only to you but also to your family. You must be _________them.
| A．along with | B．out of | C．in front of | D．away from |