优题课 - 聚名师,上好课(www.youtike.com)
  首页 / 试题 / 高中英语 / 试题详细
  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:563

Clean water and fresh air are essential for our daily life, _______ we can’t live.

A.by which B.without which C.that D.on which
登录免费查看答案和解析

Cleanwaterandfreshairareessent