( )On Sunday my mother usually goes to the supermarket _____food for family.

问题描述:

( )On Sunday my mother usually goes to the supermarket _____food for family.
A.buy B.buys C .tobuy D.buging

C .tobuy 应该是to buy为什么是C动词不定式短语做目的状语 A.buy B.buys错,因为已经位于动词goes了,而D.buging,分词短语通常用于伴随状态等