— I usually go to school by bus. — Why not going there on foot?A. trying B. try C. to try
He lives_______ in the______ village, but he is never_______.
Pollution is a serious problem. Scientists have _____ some good ways to save it.
We can’t put off _____ a plan .
I saw himwhen I passed by.
Some people plan to ______ a volunteer project to help the disabled children.