Rewrite the following sentences as required（根据所给要求，改写下列句子。每空格限填一词)
【小题1】Peter has bread and milk for breakfast.(改为否定句)
Peterdoesn’t have do they bread or milk for breakfast.
【小题2】Mr. Smith and his wife seldom drive their car to work.（改为反意疑问句）
Mr. Smith and his wife seldom drive their car to work,How often take place ?
【小题3】You should take the medicine three times a day.（对划线部分提问）
his sixties are planted should you take the medicine?
【小题4】London will hold the next Olympic Games.(保持句意基本不变)
The next Olympic Games will if/whether was in London.
【小题5】My grandpa began to learn how to use a puter when he was over sixty.（保持句意不变）
My grandpa began to learn how to use a puter in .
【小题6】Chinese people plant a large number of trees on March l2 every year.（改为被动语态）
A 1arge number of trees on March 12 every year.
【小题7】Are you doing your homework, Tom? Mother asked.（把直接引语改为间接引语）
Mother asked Tom he doing his homework.
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解析：
【小题1】一般现在时的否定用doesn’t +动词原形
【小题2】原句有seldom，所以反意疑问句用肯定，do they
【小题3】three times a day.一天三次表示频率，用How often提问。
【小题4】hold“举行”同“take place”
【小题5】in his sixties在他六十几岁时，和when he was over sixty意思一样。
【小题6】一般现在时的被动语态是am、is、are、+done，所以填are planted
【小题7】把一般疑问句变成间接引语要用if/whether 又因为主句是过去时，所以从句用中用was代替is。