题目：
With more forests being destroyed, huge quantities of good earth _______ each year.
A．is washing away
B．is being washed away
C．are washing away
D．are being washed away
答案：
答案：D
本题考查主谓一致与语态。quantities of作主语时谓语动词用复数，而“a large quantity of + 不可数名词”作主语，谓语动词用单数，因此答案在C、D之间选。each与wash away之间为被动关系，因此D为正确答案。
