Twenty years ago, people in this town lacked both the motivation to fight pollution and the knowledge of what exactly n

当前位置：高中英语 / 单选题

1. (2020·江苏模拟) Twenty years ago, people in this town lacked both the motivation to fight pollution and the knowledge of what exactly needed ________.

A . to clean B . have cleaned C . clean D . cleaning

微信扫码预览、分享更方便

使用过本题的试卷