Question

【题目】There are floors in the building and my home is on the floor.

A. twenty; fifteenth B. twenty; fifteen

C. twentieth; fifteen D. twentieth; fifteenth

Answer 1

【答案】A

【解析】试题分析：句意：大楼有二十层。我家在第十五层。第一空上的数词修饰复数名词，该用基数词；第二空上的词，修饰单数名词，该用序数词。所以选A。