她皱着眉头，看起来很生气。

She is ___frowning and looks angry.

妈妈皱眉看着我，因为我把房间弄得一团糟。

Mom was ___frowning at me because I made a mess in the room.

她皱着眉头读那封难以理解的信。

She was ___frowning as she read the confusing letter.