There is such a problem we all should A. as; pay attention to itB. that; attract our att

问题补充：

There is such a problem we all should ．

A. as; pay attention to it

B. that; attract our attention

C. as; pay attention to

D. that; attract our attention to it

答案：

A. as; pay attention to it

B. that; attract our attention

(答案→)C. as; pay attention to

D. that; attract our attention to it

解析：考查定语从句。先行词为a problem，pay attention to后缺少宾语，such… as 为固定结构，所以用as，并在从句中作宾语，故选C。