With more forests _____being destroyed, huge _____ of good earth _____ washed away each year.

A．are ; number ; is

B．/ ; quantities / are

C．be ; number ; are

D．/ ; quantities ;is

超级计算机是计算机中功能最强、运算速度最快和（）的一类计算机。

A.内存最大

B.存储容量最大

C.功能最全面

D.输出最快捷