here ( ) a set of key .here后面应该是用are还是 is?

Here is （）?Are these yours.A.a set of there和here后面用is还是are?(>_ 英语翻译用here是here is ....还是here are Here is a set of___(key)怎么做?横线上填空! here is a set of keys.改为否定句 A set of keys is here划线提问 是a set of keys还是a set of key? 今天老师跟我们说a set of keys后面用is,后来我们读了一篇短文是这样的：Found:A set of key Here _(be) a set of keys. 应该是why is nobody here?还是why nobody is here? no one of them is here .是is 还是 are 应该是 get out of here 还是 get out here