Great changes have taken place in that school. It is no longer _____it was 20 years ago, ______it was so poorly equipped.

A． What ;when

B．that; which

C． what; which

D．which; that

按照（）划分，通货膨胀分为预期的通货膨胀和未预期到的通货膨胀。

A.对价格影响的差别

B.通货膨胀的成因

C.人们的预料程度

D.表现形式