—Could you tell us _________ to do it?—Of course. First of all, you should clean the wall, then clean the floor.
Stop smoking, ________ your health will get worse soon.
________ dog is ________ useful animal and ________ honest friend as well.
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