Here a set of keys and here my books.A. is isB. is areC. am isD. are are

问题补充：

Here a set of keys and here my books.

A. is, is

B. is, are

C. am, is

D. are, are

答案：

A. is, is

(答案→)B. is, are

C. am, is

D. are, are

解析：句意：这是一套钥匙，这是我的书。第一空中主语是a set of一套，是单数，系动词用is；第二空中books书，用了复数，所以系动词用are；故选B。