your mother a sister?A. Do haveB. Do hasC. Does haveD. Does has

问题补充：

your mother a sister?

A. Do, have

B. Do, has

C. Does, have

D. Does, has

答案：

A. Do, have

B. Do, has

(答案→)C. Does, have

D. Does, has

解析：本题的含义为你的妈妈有一个姐妹吗，主语为单数第三人称，谓语动词为一般动词have，故使用does构成一般疑问句，后跟动词原形have，故本题选C。