Does all the wool ____Does (come) from sheep?中间的空填什么?come还是comes?

题目

Does all the wool ____Does (come) from sheep?中间的空填什么?come还是comes?

答案

come
这是一个一般疑问句,助动词提到句首了,动词则必须还为原形,原来是comes,现在则变成come.