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

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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,意思为曾经做过某事（而此事对现在造成影响或者在现在此时而言的某种表述表达）
明白吗?

一道英语选择题“I can not see the blackboard very well ” “perhaps yo — I can't see the blackboard very well. —Perhaps you need___ 24.__ I can't see the blackboard very well.__ Perhaps you ne I can see the words on the blackboard very () A.good B.well i can see the words on the blackboard very 【 well】?为什么要用副词'' I can't see the blackboard （）?A.clearly enough B.enough well I am not felling very well.I____to see the doctor. I can ----see the words on the blackboard I can see _____ “ f ” on the blackboard. 一道英语的选择题：____I can not help admiring the man's courage,I don i am not feeling very well i to see the doctor 括号内填什么I am not feeling very well.I() to see the doctor.