Here a set of keys and here my books.A. are isB. is isC. is areD. are are

问题补充：

Here a set of keys and here my books.

A. are ,is

B. is ,is

C. is ,are

D. are ,are

答案：

A. are ,is

B. is ,is

(答案→)C. is ,are

D. are ,are

解析：here的句式通常是倒装句，主语在后，第一个空的主语是一串钥匙，是单数，

前面动词要用is，my books是复数，前面动词用are，故选C。