铁、铜、铝是常见的金属，下列说法错误的是[ ]

A．都有导电性

B．都是不活泼金属

C．都能与氧气反应

D．都具有良好的延展性

句型转换。

1. She has supper at 7:00 p. m. (对画线部分提问)

     ______ ______ does she have supper?

2. What time is it now? (同义句转换)

     ______ the ______ now?

3. Jack has his lunch at school. (改为一般疑问句)

     ______ Jack ______ his lunch at school?

4. Scott works very long hours every day. (改为否定句) 

    Scott ______ ______ very long hours every day.

5. I forgot to write a letter to my friend. (改为同义句)

    I failed to ______ ______ my friend.