分类：教育/科学-外语学习-英语考试
问题：请教道题wheretofindhimandhowtofindhe 
where to find him and how to find hem----to us.

are not known 
is not known
doesn;t know
has not known
选B。怎么解释呢？
回答：where to find him and how to find them_____to us. 
A.are not known  B.is not known 
C.doesn;t know   D.has not known 
正确答案:B
译文:我们还不知道能在哪儿怎么样才能找到他们.
解析:考查主谓一致,由两个以上疑问词加不定式作为主语,一般谓语动词用复数形式,如果两个部分表达同一概念,属于同一整体,谓语动词仍然用单数形式.这里"在哪儿/怎么样",我们通常看作是同一概念的两个方面,所以用单数形式,而且事情不为人知,是被知道,所以用被动式.答案选择:B