You_____ all those calculations! We have a computer to do that sort of thing.
| A．needn’t have done | B．must not have done |
| C．shouldn’t have done | D．can not have done |
___is certain is ___prevention is more important than treatment .
| A．It;that | B．What;that | C．As;what | D．What;what |
___has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .
| A．That | B．What | C．In spite of what | D．Though what |
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
| A．that what | B．what | C．that | D．what that |
In his speech, Premier Wen Jiabao points out that creativity is __it takes to keep a nation highly competitive .
| A．how | B．what | C．which | D．that |
The book is meant to ___needs it .
| A．who | B．whoever | C．whomever | D．whom |