.

What a pity! All his property, the books, the pictures and the house, __________consumed by the big fire.

A．were

B．was

C．had been

D．have been

基本形逐渐地向外或向内扩大或缩小，有规律地变化即为（）

A.重复

B.对称

C.近似

D.渐变