The time he has devoted in the past years _____________ the disabled is now thought to be ________ great value __________ him.
He has worked in this school for many years, _______ he?
—What’s wrong with you? —I can’t decide ______ next.
Our English teacher often says to us, “ English well is very important. ”
Basketball is so exciting that _____ people play it for fun.
Don’t be lazy,_____ you will fail the exams.