The government has to close those small factories to prevent the water of the river ______.
| A．polluting | B．from polluting |
| C．being polluted | D．polluted |
It is better to ask someone for advice rather than ___________something.
| A．risk doing | B．risk to do | C．to risk doing | D．to risk to do |
---It’s a long time since I saw my sister.
---___________ her this weekend?
| A．Why not visit | B．why not to visit | C．Why not visiting | D．Why don’t visit |
——I’m sorry that I didn’t work out this problem.
——It’s ___________our ability. I didn’t work it out, too.
| A．over | B．beyond | C．more than | D．above |
The manager suggested an earlier date ____________ the meeting.
| A．on | B．for | C．about | D．with |
The Chinese are good at table tennis ___________the English are interested in football.
| A．if | B．as | C．while | D．since |