My bike is new和Lucy's bike is old合为一句

问题描述:

My bike is new和Lucy's bike is old合为一句
还有Jim's ruler is long .和Tom's ruler is short.
Li Ping's computer is expensive.和Lin Tao's computer is cheap.

My bike is new,but Lucy's bike is old.
My bike is new,but Lucy's isn't.
这两个都行
后面的几句也同理,用but连接就行还有Jim's ruler is long .和Tom's ruler is short. Li Ping's computer is expensive.和Lin Tao's computer is cheap