Question

【题目】I visit three stores before ________ a T-shirt.

A. buy B. bought C. to buy D. buying

Answer 1

【答案】D

【解析】

句意：在买一件T恤之前，我去看了三家商店。A. buy动词原形；B. bought过去式；C. to buy动词不定式；D. buying动名词或分词。before介词，“在……之前”，后跟动词-ing形式，故答案为D。