13. The book 50 maps a Chinese map and an American map .A. contains includeB. contain

问题补充：

13. The book 50 maps , a Chinese map and an American map .

A. contains , include

B. contains , including

C. includes, contain

D. includes, containing

答案：

A. contains , include

(答案→)B. contains , including

C. includes, contain

D. includes, containing

解析：可联系答案网客服索取。