一些英语句型转换,请帮帮忙.1.This baseball bat is (Xiao Hua's).[对括号部分提问]_

一些英语句型转换,请帮帮忙.
1.This baseball bat is (Xiao Hua's).[对括号部分提问]
______ _______ is this baseball bat?
2.The bike under the tree is (Liu Hai's).[对括号部分提问]
______ bike is Liu hai's?
3.Jim is one of my friends.(改为同义句）
Jim is a friend ______ ________.
知道的请写下答案,如果不嫌麻烦的帮我解释一下为什么要这样填.
thanks very much!