Must I finish the homework tonight—No, you.Youcan finish it tomorrow.

Excuse me, sir. I’m afraid you can’t smoke here. This is non-smoking area.—Oh, sorry. I ____________ the sign.

Good news-two of our classmates ______ intoTsinghua University in advance!

(2014·辽宁丹东市质检)While prices are rising so fast，many people are working out ways to________their expenses

If you are going to stay in the United States for longer than a(n) ______ visit, you may be interested in learning more about its people and culture.