A: What's that? It looks strange.
B: It's an old machine.
A: What it used?
B: It for getting water from a river or a lake.
A: How did it work?
B: Usually two people stood on it. They pushed the pedals(踏板)down hard with their feet. Thencould brought up.
A: What it made ?
B: I think it wood. It canhardly seen in China now.
