状语从句
问题描述：
状语从句
____ the poem a second time,the meaning will become clearer to you.
A.Your having read B.While reading
C.If reading D.When you read
_____ your composition carefully ,some spelling mistakes can be avioded.
A.Having checked B.Checked C.If you check D.To check
答
B应该是while you read
C应该是if you read
选D,因为这里是时间状语从句
相当于the meaning will become clearer to you when you readthe poem a second time
同理补充的选c,是条件状语从句