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 444

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
相关知识点

Onewinterday,hesawthetracksofa