It is known to us that it was such great efforts all the Chinese athletes had made helpe

问题补充：

It is known to us that it was such great efforts all the Chinese athletes had made helped them get 51 gold medals in the Beijing Olympic Games.

A. as, that

B. that, which

C. that, as

D. which, which

答案：

(答案→)A. as, that

B. that, which

C. that, as

D. which, which

解析：

第一空考查定语从句的用法，先行词被such、as、so修饰的时候，定语从句用as引导。第二空是that强调句型。句意是：众所周知，正是中国运动员做出了如此大的努力帮助他们赢得奥运会51枚金牌。选A。