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