____ has been proved again and again that ____ is said in the ads greatly affects people’s impression of the products.

A．There; what

B．There; that

C．It; which

D．It; what

石油钻井中石灰乳浆堵漏所用石灰乳浆的基本材料为（）。

A.黏土、石灰

B.烧碱和水玻璃

C.石灰和烧碱

D.黏土、石灰、烧碱和水玻璃