用how long 开头写问句,用read the book ,an hour ago 这两个提示回答

how long have you read the book?
Since an hour ago
======以下答案可供参考======
供参考答案1:
How long have you read the book?
-I read the book an hour ago.
供参考答案2:
请问是要一问一答吗？
供参考答案3:
2楼的回答错了。