________ Joe ________ Steve may go camping with you on Tuesday, because they are not allowed to go out on school days.
________ 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
If we travel a short distance, we had better walk taking a bus. A. instead B.instead of C. take the place of