—Uncle Tom is an old friend of . I want to see him.—OK. He will be here .
—_____ you please play tennis with me? —Sorry, I _____.
Smoking is bad for your health. You should.
Aron water five days later.
He lives_______ in the______ village, but he is never_______.
Pollution is a serious problem. Scientists have _____ some good ways to save it.