"Is your friend a taxi driver?"
This is a straightforward question asking about the occupation of the speaker's friend.
Example sentences:
"Do you have any friends who are taxi drivers?"
"I was talking to a taxi driver yesterday, is your friend one too?"
中文翻译:
"你有没有任何是出租车司机的朋友?"
"我昨天在和一位出租车司机聊天，你的朋友也是吗？"