你干吗拉着个脸?

2. I never know whether my boss likes my work or not -- he is a real poker face!

我从来也不知道老板到底喜不喜欢我的工作。他脸上可真是一点表情都没有。

3. Tell him how much it'll cost and that should wipe the smile off his face.

告诉他要多少钱，他准会收起笑脸。

4. He always keeps a straight face.

他总是板着脸。

5. Don't screw up your face.

别愁眉苦脸的。