首页 / 高中英语 / 试题详细
  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 443

One winter day ____, he saw the tracks of animals in the snow and observed that the appearance of each one was different.

A.while he hunting B.while hunting
C.while he hunt D.while hunted
登录免费查看答案和解析

Onewinterday,hesawthetracksofa