首页 / 高中英语 / 试题详细
  • 更新 2022-09-03
  • 科目 英语
  • 题型 未知题型
  • 难度 容易
  • 浏览 877

They kept trying _____ they must have known it was hopeless.

A.if B.because C.when D.where
登录免费查看答案和解析

Theykepttryingtheymusthaveknow