The boy lay on his back,his teeth __and his glaring eyes ___.

问题描述:

The boy lay on his back,his teeth __and his glaring eyes ___.
A.set; looked B.set; looking C.setting; looked D.setting; looking
为什么前一个选set,后一个选looking

his teeth (were) set and his glaring eyes (were) looking.
teeth只能被动set(过去分词); eyes主动looking