I have found a mobile phone . Do you know (   )?

A.who the phone belonged to

B.who is the owner of the phone

C.who the phone belongs to

请问老师哪个是正确的呢？

答案给了B，我感觉AC也说得通啊。

谢谢老师指点

回答如下：

手表属于谁的属于一个客观事实，因此需要使用一般现在时态，不能使用其他时态，所以答案为B

I have found a mobile phone . Do you know (   )?

I have found a mobile phone. Do you know who is the owner of the phone .

我发现了一部移动电话，你知道这部手机的主人是谁呢？