when was the ...invented? who were they invented by? what ane they used for?造一对话.如上
问题描述：
when was the ...invented? who were they invented by? what ane they used for?造一对话.
如上
答
when was the ...invented
答
意思是
这中东西是谁发明的，什么时候发明的，
答
A: When was the telephone invented?
B: It was ivented about 1 hundred years ago.
A: Who were they invented by?
B: They were invented by Bell.
A: What are they used for?
B: They are used for calling people far away of you, so we can get iontouch with people easier.