Question

【题目】People __________travel by plane years ago. ( )

A.don't

B.doesn't

C.didn't

Answer 1

【答案】C

【解析】

句意为：人们多年前不乘飞机去旅行。“years ago”意为“多年前”，句子用过去时，否定形式为did not，缩写为didn't，故选C。