The doctor says that the problem with her husband's eyes（ ） by many reasonsA.causeB.causesC.is causedD.are caused 快
问题描述：
The doctor says that the problem with her husband's eyes（ ） by many reasons
A.cause
B.causes
C.is caused
D.are caused
快
答
C 被动语态。the problem单数~所以用is。加油努力哈~
答
选C with her husband's eyes是the problem 的定语，其实就是the problem is caused by many reasons，这个问题是由很多原因造成的。
答
is caused(导致)
整句话的意思是“医生说她丈夫的眼睛的问题是由很多原因导致的”
此处应用被动语态,从句的主语是the problem,谓语动词用单数