I go to school every day on my new _______ /baɪk/.
| A．bag | B．bed | C．back | D．bike |
________ dog is ________ useful animal and ________ honest friend as well.
| A．A; a; an | B．A; an; a | C．The; an; a | D．The; an; an |
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