The plane has taken off, so we can’t have the chance to see Jim off.
| A．yet | B．just | C．never | D．ever |
Food safety is important. Rules ______ to stop people from food pollution.
| A．must make | B．must be made |
| C．can’t make | D．can’t be made |
There will be a stamp show in the museum ______ we visited last week.
| A．who | B．when | C．which | D．what |
— Linda, could you tell me ______? — He is an actor.
| A．what he does | B．what does he do |
| C．where he works | D．where does he work |
Smoking is not allowed in public places since May 1st. It may be a good chance for some people to ______ smoking.
| A．put up | B．give up |
| C．pick up | D．look up |
The Internet is really ______ to us. We can easily find the information we need.
| A．safe | B．hard | C．boring | D．useful |