题目内容：

 

1.I bought this book two years ago. ( 改为同义句 )

I __________   ___________ this book _____________ two years.

2.The spaceship has reached Mars. ( 改为一般疑问句 )

________ the spaceship  ______________ Mars ?

3.I have had the computer for two months. ( 对划线部分提问)

____________  ___________ have you ____________ the computer ?