G-4:get one's back up 生气

A:Why did you get your back up, dad?

A:你为什么生气，爸爸?

B:What a mess in your room!

B：瞧瞧你房间多乱。

A:I'm playing with my toys. I'll tidy up the room after a while.

A:我正在玩玩具，过会儿我会把房间收拾好的。

B:That's all right.

B：好吧!