And I thought, Oh, you are kidding.

我当时心想，怎么可能，你们一定是在开玩笑吧。

youdao

Are you kidding?

你是在开玩笑吗？

youdao

Wow! Are you kidding?

哇！你在开玩笑吧？

youdao

She says, "What? I haven't heard such a thing." "Are you kidding?"

她说，“什么？我从没听过有这种事，你在开玩笑对吗？”

I'm glad 课堂 - SpeakingMax英语口语达人

If you think you can even get to the truth of a complex, contentious issue with a couple of phone calls, you are kidding yourself and your readers.

FORBES: How to Fix Fact-Checking

Are you kidding, they already are and have been for some time.

FORBES: Apple or Google?

Rep. BURTON: Gee-whiz, are you kidding me?

NPR: Before Congress, Clemens Insists He Is Innocent