小博士：细心的同学们肯定发现了有些名词有单数(singular)和复数(plural)两种形式，而有些名词只有单数形式，这是怎么回事呢？让我来告诉你吧。英语中，名词按其所表示的事物的性质，可分为可数名词(countable noun)和不可数名词(uncountable noun)，可数名词有复数形式，不可数名词一般没有复数形式。名词单数变复数的变化规则见下表。

比一比，看谁写的单词多！

1　　直接加-s的单词有：________________________________.

2　　加-es的单词有：___________________________________.

3　　变y为i再加-es的单词有：__________________________.

4　　不规则变化的单词有：_______________________________.

　　－Where ________ the baseball?

　　－It ________ on the floor.

[　　]

A．is, are　　B．are, is　　C．is, is

分析：where表示“在哪里”，用来提问位置和处所。后面跟的是可数名词单数则用Where is…？提问；后面跟的是可数名词复数，则用Where are…？提问。

Chinese athlete Liu Xiang，winner of gold medal in the men's 110m hurdles at the Althens Olympics，published his book，I'm Liu Xiang，recently in his hometown of Shanghai．

It seems that many people can't help comparing Liu Xiang with another Shanghai native，basketball giant（巨星）Yao Ming，who also recently published his book，A Life in Two Worlds．Manager Dai，the editor of the book I'm Liu Xiang，explained the differences between the two books as he saw them．Firstly，Yao's book was written mainly for Americans，while Liu's readers will be mainly Chinese．Secondly，A Life in Two Worlds was written in the third person singular（单数）by an American writer who recorded Yao Ming's stories．I'm Liu Xiang was written in the first person and included many articles from his diaries．Lastly，according to Dai，Yao enjoyed the advantage of being born in a sporty，rich family，unlike Liu，who came from a working class family and therefore had to go through greater hardship（艰难）before becoming a world-known athlete．So if you enjoy reading about mental（精神上的）suffering and physical pain，read I'm Liu Xiang．If you want to practice your English，read A life in Two Worlds．

任务：请阅读上面这篇短文，根据短文内容完成下面表格中关于我国著名运动员刘翔和姚明的信息：