题目内容：

1.Tom along with his classmates_______for the coming exam.
A.are preparing B.are preparing themselves
C.is preparing him D.is preparing himself
2._______is to attend our party this evening.
A.Both the singer and the dancer B.Either the singer or dancer
C.The singer or dancer D.The singer and dancer
答案我有了,但是不太懂,

优质解答

1.知识点是主谓一致：当主语部分含有with,together with,along with,as well as,besides,except,but,like等介词或介词短语时,谓语动词用单数形式；但“名词+as well as+名词”时,谓语动词一般应与第一个名词一致.
此题用的是along with,Tom是单数名词,所以谓语动词应该用单数,所以选择D
2.知识点也是主谓一致,（a/the)+(单数名词)+(and)+(单数名词),指的是同一个人或物,谓语动词用单数形式；（a/the）+（单数名词）+（and）+（a/the）+（单数名词）,指两个人或物,谓语动词用复数形式.
题中给的谓语动词时单数is,也就是我上面说的第一种情况,对照答案可知选择D,表示同一个人,意思是这个歌手兼舞蹈家今天晚上要来参加我们的聚会.