---- Why have you bought so much food ?
----My good friends ________ to stay with me for the weekend.

Three hours with your girl friend  _____to be a short time.

Just an hour ago he was telling me on the phone that he ________ home right after the work.

Tom is very happy in China during this period because his Chinese ________ every day.

—I guess you can buy such a smart phone for 300 dollars.
—I could just two months ago，but the price ________ by 20%.

Because the shop ________，all the T?shirts are sold at half price.

—Is that Dec.21,2012 is the end of the world true?
—Definitely not，but ________ must be paid to global climate change.

When he ________ the door，he found his keys were nowhere.

You can certainly leave the classroom as soon as your homework__________.

Please don’t phone him between 1 and 3 p.m. tomorrow. He ______ a lecture then.