There are _____ desks in hisclassroom..

have you been like this —Since Friday.

28.The police were trying to _____ the suspect’s motive of killing his wife.

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 past 30 years has ______ the great changes that have taken place in China