這是英文翻譯中文的問題?

From Longman Dictionary of Contemporary English
Whose:
used to ask which person or people a particular thing belongs to
1. Whose is this?
2. Whose keys are those?
可知1. Whose camera is this?
2. whose is this camera? 都對
網路上國外英語老師解說如下 – 原句照抄
Whose book is this? sounds better simply because the listener knows the topic (ownership of the book) immediately but Whose is this book? is all right.

第一句是對的。
第二局是錯的。