3.His parents made him do housework.

He                     house- work by his parents.

2.The villagers built the stone bridges.

The stone bridges                  by the villagers.

1.Edison invented the light bulb.

The light bulb                Edison.

Basketball was invented by a 1      . C doc- tor named James Naismith. who was born in 1861. When he was a college teacher,he was asked to 2.       t of a game that could be played in the winter. Dr. Naismith created a game to be played inside on a hard 3. f       . Dr. Naismith 4. d        the men in his class into two teams and taught them to play his new game. Players on the same team must work together to get the ball in the other team's 5. b      . At the same time,they need to stop the 6. c       team from getting the ball into their own basket.

10. It helps       (develop) the game.

9.It's used       (wash) clothes.

8.Basketball       (play) in many countries now.

7.These stars encourage young people        (work) hard to achieve their dreams.

6.The food is very       (salt) .

5.China is      (know) for the Great Wall.