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)
Peter has bread and milk for breakfast.(改为否定句)
Peter_______ _________bread or milk for breakfast.
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,______ ______?
You should take the medicine three times a day.（对划线部分提问）
________ ________should you take the medicine?
London will hold the next Olympic Games.(保持句意基本不变)
The next Olympic Games will _______ ______in London.
My grandpa began to learn how to use a computer when he was over sixty.（保持句意不变）
My grandpa began to learn how to use a computer in ______ ______.
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.
"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.