请在那句话的末尾加上一个问号。

Please add a ___question ___mark at the end of that sentence.

你的疑问句里是不是漏掉了一个问号？

Is there a ___question ___mark missing from your query?

最后一个符号，一个问号，表明这句话是一个询问。

The final symbol, a ___question ___mark, indicates the sentence is an enquiry.