板着脸put on a grave expression;

　　哭丧着脸with grief written all over his face;

　　拉长脸pull a long face;

　　脸红脖子粗flush with agitation;

　　脸气歪了face contorted with fury;

　　面有难色show signs of reluctance;

　　面如死灰look deathly pale;

　　吓得面无人色turn ghastly pale with fright