Walmart，which is one of the largest American supermarket chains，________ some of its stores open 24 hours on Mondays through Saturdays.(2012·安徽)

The official made the demand thatthe soldiers _____ at once ______ battlefront

Where did you go on National Day? —Jiuzhai ValleyI ______ to go to France, but the expense was too high

Theteacherspokeofsomewritersandsomebooks________we need to know.

I hear we will have an vacation.