当我提到他的名字时，她皱起了眉头。

She ___frowned when I mentioned his name.

她看着他并皱起了眉头，奇怪的是，他却回以微笑。

She looked at him and ___frowned, strange, but he smiled back.

老板听到令人失望的销售报告后深深地皱起了眉头。

The boss ___frowned deeply upon hearing the disappointing sales report.