I didn't know Jack's address ________ he wrote to me.
A.because B.when C.until
— Need I finish my homework today?
— Yes, you ________.
A.need B.can C.must
It’s very clever ________ him ________ out such a difficult problem.
A.of; to work B.of; working C.for; to work
—I’m not going to swim the day after tomorrow.
—________. I have to stay at home and do chores.
A.So am I B.Neither I am C.Neither am I
Everything seems ________ better.
A.to be B.is C.being
Working hard makes ________ possible for us to pass the final examination.
A.this B.that C.it
