句型转换。

1. The telephone was invented in 1876. (对画线部分提问)

    _____ was the telephone _____ ?

2. Julie Thompson invented them. (改为被动语态)

    They _____ by Julie Thompson.

3. Keys are used for opening the doors. (对画线部分提问)

     _____ are keys used _____ ?

4. I filled the basket with flowers．(改为同义句)

    The basket is _____ flowers.

5. Tea wasn't brought to the western world until 1610. (改为同义句)

     Tea _____ brought to the western world _____ 1610.