同义句转换 （本大题共5分，每格0.5分）
My parents have been married for twenty years.(同义句)
My parents __________ __________ twenty years ago.
Some people look down on the disabled and that’s not right. (同义句)
It’s __________ __________some people to look down on the disabled.
The Smiths used the old bus as their house.(改为被动句)
The old bus  __________ __________as their house by the Smiths.
People wrote letters to keep in touch with each other. (同义句)
People kept in touch with each other __________             letters.
I bought the bike one month ago. (划线部分提问)
___________ ___________ you buy the bike?