1．He covered his mouth to hide his yawn.
他捂住嘴偷偷打了个哈欠。
2．Our mouths dropped open in surprise.
我们惊奇地张大了嘴。
3．His mouth widened to a smile.
他咧开嘴笑了。
4．Suddenly a hand cupped her mouth.
突然一只手捂住了她的嘴。
5．A smile played around his mouth.
他的嘴上挂着一丝笑意。
6．He straightened up and looked at me, openmouthed.
他直起身，目瞪口呆地看着我。
7．She froze, her mouth hanging open.
她呆住了，嘴张开着。
