The science of computer, _____rapid progress has been made in recent years, is the most important of all science.
______________absent from competition for two seasons,Shen Xue and Zhao Hongbo still hadthe right feeling on the ice .
.Most farmers live at_____________mercy of nature where few water storage equipment is in________use.
一Come on!Join us for jogging.——Thank you,but_____________
---What do you think of our design for the new car? ---Pretty good. But I find theirs is _____ worth considering and study.
Obama, _____ president of the USA, won _____ Nobel Prize for Pease in 2009.