Be careful not to ______ your bike with so many heavy bags.
| A．turn off | B．set off | C．take off | D．fall off |
The garbage too much space .
A. takes away B.takes off C. takes up
We should do everything we can the environment .
A. to protect B. protectC. protecting
______of the earth ______ covered by water.
A. Two thirds; is B. Two thirds; are C. One thirds; is
If we travel a short distance, we had better walk taking a bus.
A. instead B.instead of C. take the place of
The wind is blowing strongly with lots of sand, so I can’t see _______.
A. nothing B. something C. anything