当前位置:中文谷 >

习题库

>  Expertshavebeenwarning   ofthehealthriskscausedbypassi...

 Expertshavebeenwarning   ofthehealthriskscausedbypassi...

问题详情:

 Expertshavebeenwarning   ofthehealthriskscausedbypassi...

 Experts have been warning    of the health risks caused by passive smoking


   A. at a time     B. at one time    C. for some time   D. for the time

【回答】

 



解析:本题考查固定短语。从句中have been warning 可知,应用for some time 一段时间,at a time 每次;at one time 曾经。

知识点:固定句型

题型:选择题

标签:
  • 文章版权属于文章作者所有,转载请注明 https://zhongwengu.com/zh-hans/exercises/pg8jjy.html