句型转换,变被动.变被动1.they built a birage over the river.2.bell inve

句型转换,变被动.
1.A bridge was built over the river.
2.The telephone was invented by Bell in 1876.
3.Too much time is spent playing volleyball by him.
4.Cars are made by workers in the factory.
5.The TV was turned on by him after dinner.
6.Sports is often talked about by them.
7.He is looked after well by his mother.

变被动
1.a bridge was built over the river by them.
2.the telephone was invented by bell in 1876.
3.too much time is spent playing volleyball by him.
4.cars were made in the factory by wo...

1 A bridge was built by them over the river.
2 The telephone was invented by Bell in 1876.
3 Too much time is spent by him playing volleyball.
4 Cars are made by workers in the factory.