句型转换，按要求完成下列各句。
1. I have a book to give you. (改为疑问句)
    _____ you have a book to give _____ ?
2. You should borrow 10￥from your friends.(改为否定句)
    You _____ _____ _____ 10￥from your friends.
3. She is a woman doctor.（改为复数句）
    _____ are _____ _____ .
4. To work out the problem is hard. (同义句）
    _____  is hard _____ work out the problem.