There are floors in my house and my bedroom is on thefloor.A. three; twoB. three; secondC.

问题补充：

There are floors in my house and my bedroom is on thefloor.

A. three; two

B. three; second

C. two; third

D. second; three

答案：

A. three; two

(答案→)B. three; second

C. two; third

D. second; three

解析：句意:我家有……层楼,我的卧室在……楼.结合语境可知前一空表示数量,故用基数词,后一空表示顺序,故用序数词.结合语境可知选B.