一道英语选择题“I can not see the blackboard very well ” “perhaps you need ——”

问题描述:

一道英语选择题“I can not see the blackboard very well ” “perhaps you need ——”
A to examine your eyes
B to have examined your eyes
C having your eyes examined
D to have your eyes examined

选D首先need to do 需要做某事,用不定式.其次have sth done 请(某人)做某事.也就是说,have your eyes examined 让(医生)检查你的眼睛.但是是A中没有表达出这类意思,而B中have done sth 是完成时,意思为曾经做过...