I will help my mother the pet dog while she is abroad.
| A．look after | B．look through | C．look into | D．look like |
Stop smoking, ________ your health will get worse soon.
| A．and | B．or | C．but | D．s o |
________ 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