急！！关于主语一致和虚拟语气的五个英语选择解答！！！！

1. one third of the students （ ） in favour of it last week。
A.are B.is C. were D.was

这道题选C. were 分数百分数修饰名词或代词 作主语 谓语动词与被修饰的名词或代词保持一致，这道题中谓语动词与the students 保持一致。 时间状语last week ，所以时态使用过去时。
2. He is one of the boys who( ) good at English.
A.are B.is C. were D.was

这道题选A.are 定语从句中关系词作主语谓语动词与先行词保持一致。先行词是one of the 加可数名词的复数时，定语从句的谓语动词用复数。先行词是the only one of 或the very one of 时定语从句的谓语动词用单数。时态显然是一般现在时。
3.He is the only of the boys who ( ) good at English.
A.are B.is C. were D.was
这道题答案为 B.is 解释看上面第二题

4.Nick,along with his classmates, ( ) to help pick apples in the village this weekend.
A.are B.is C. were D.was
这道题答案为B.is 这道题考察主谓一致。主语后面接说明主语的修饰语或插入语如with.../as well as.../together with.../along with../like.../rather than.../as much as...等，谓语动词不受 这些 修饰语或插入语的影响，仍保持和主语一致的关系。所以这道题谓语动词和主语Nick 保持一致而不是和插入语along with his classmates保持一致。
5.He as well as I ( ) due to come at 8.
A.are B.is C. were D.was
这道题答案是B.is 解释看上面第四题。

1.C涉及分数百分数的主谓一致，看of后面的词是可数名词还是不可数，students，所以复数，last week过去时。
2.A定语从句的谓语看先行词，boys,所以复数。时态现在时。
3.B 先行词是the only one of the ....,定语从句用单数
4.B along with,as well as,together with等，主谓一致就远原则，所以看NIck
5B原因同上

1.one third of 是三分之一的意思，三分之一的学生是复数，而且本句是过去时，所以是C。
2.先行词是boys,他是擅长英语的男孩子们中的一个，擅长英语的不止他一个人，所以用复数。
3.先行词是the only of the boys,他是唯一一个擅长英语，所以应该用单数。
4.along with his classmates相当于插入语的作用，一般做题的时候不看，这个部分是补充成分不是主语，主语只有一个所以用单数。
5.as well as 相当于介词的作用，也是一种补充说明，主要只有HE，所以用单数。如果将as well as换成and，就要用复数。and是连词，连接并列成分。