It’s high time that we _____ measures to stop selling polluted vegetables.
___is certain is ___prevention is more important than treatment .
___has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .
The experience of the Chinese nation attests to a truth____ a nation loses in times of disaster will be made up for by her progress
In his speech, Premier Wen Jiabao points out that creativity is __it takes to keep a nation highly competitive .
The book is meant to ___needs it .