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A. It can hardly be seen in China now.

B. Then the water could be brought up.

C. It was invented many years ago.

D. Usually two people stood on it.

E. It was used for getting water.

F. What was it used for?

G. It's an old machine.

AWhat's that?
B: 1__________ 

A: When was it invented?

B: 2__________

AHow did it work?

B3__________    They pushed the pedals(踏板)down hard with their feet. 4__________

A: What was it made of?

B: It was made of wood. 5__________

A; Yes, I never saw such a machine before.

1. _______   2. ________  3. _________

4.________   5. _________

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