________ walk is expected to last all day，so bring ________ packed lunch.
| A．A；a | B．The；/ | C．The；a | D．A；/ |
-Can I smoke here?
-Sorry. We don't allow ______ here.
| A．people smoking |
| B．people smoke |
| C．to smoke |
| D．smoking |
Once harm is ______ to the eco-system, all species will ______ , including man himself .
| A．made; be in danger |
| B．done; be dangerous |
| C．caused; be endangered |
| D．done; be in danger |
With no more wood added to the fire, it finally died ______
| A．away |
| B．from |
| C．out |
| D．off |
-When did the Asian Games ______？
-I remember that people held the first Asian Games in 1951.
| A．come into power |
| B．come into being |
| C．come true |
| D．come out |
The river ______ badly now. We must do something to stop the waste water from being poured into it.
| A．is polluting |
| B．pollutes |
| C．is being polluted |
| D．has polluted |