1、The singer and the dancer ______ come to Beijing.

　　A. has　　B. have　　C. are　　D. is

　　2、The little boy still needs the ______ 20 dollars to do with some things ______.

　　A. remaining; remained to be settled

　　B. remaining; remaining to be settled

　　C. remained; remained to settle

　　D. remained; remaining to settle

　　3、The rescue team must have searched for the missing visitors two days ago,_____?

　　A. mustn't they　　B. haven't they

　　C. didn't they　　　D. hadn't they

　　参考答案&解析：

　　1、B　由and连接的两个单数名词作主语时，一般用复数形式，但and所连接的并列主语是同一个人，事物，或概念时，谓语动词用单数。这两种情况区分如下：a/the+单数名词+and+单数名词，指的是同一个人或物;a/the+单数名词+and+ a/the+单数名词，指两个人或物。故答案为B

　　2、B　第一个remaining用作形容词，作“剩下的”解;第二个remaining to be settled是-ing形式短语作定语。故答案为B。

　　3、D　must后的反义疑问句一般与must后保持一致，但该句中有明确的过去时间状语 two days ago，必须要与two days ago保持一致，因此反问语气用过去式，故答案为D。