Roy didn’t want his mother to work so hard to ________ his college education.
A. pay B. afford C. cost D. spend
He was about to go to bed __________ the doorbell rang.
A. while B. as C. before D. when
As the New Year is coming, we have ____________ preparation work to do.
A. a great deal of B. a great deal
C. a number of D. the number of
—Some people believe _______ green can give us energy.
—I agree. But I wasn’t certain ________ I was suitable for wearing green in the past.
A. that, that B. if, if C. that, if D. if, that
Without friendship,one won’t be happy ________ he is very rich.
A. even B. although C. through D. if
Don’t leave the office until your work ________.
A. finishes B. finished
C. is finished D. was finished