— People should spare no efforts to protect the environment.
— ________. Air pollution does harm to our health.
| A．All right | B．Take it easy | C．Go ahead | D．Exactly |
----Have you ever ______Lintong to see the Terra Cotta Warriors?
----Yes, I have.
| A．went to | B．gone to | C．been in | D．been to |
We must do something to stop people from ______.
| A．to throw litter about | B．to throw litter into |
| C．throwing litter about | D．throwing litter into |
Our teacher did what she could ______us with English.
| A．help | B．helped | C．helping | D．to help |
----Shall we go and ______hello to foreign teachers?
----Good idea! Let’s go.
| A．say | B．speak | C．shout | D．talk |
The film ______for ten minutes.
| A．has begun | B．has been begun | C．has been on | D．began |