629.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

630.Dress warmly,____ you'll catch a cold.

A.on the contrary

B.or rather

C.or else

D.in no way

629.答案是C;

such…as引导定语从句，且as充当从句中的宾语。

630.答案是C;

on the contrary相反地；or rather更确切地说；or else=or;in no way决不。