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Books will only be on computers,not on paper. （改为疑问句作肯否定回答）
一般疑问句：Will books only be on computers, not on paper?
肯定回答：Yes, they will.
否定回答：No, they won't.
People will live to be 200 years old. （同上）
一般疑问句：Will people live to be 200 years old?
肯定回答：Yes, they will.
否定回答：No, they won't.
There will be only one country. （同上）
一般疑问句：Will there be only one country?
肯定回答：Yes,there will.
否定回答：No, there won't.