1.   Gabriel had to bite his cheeks to keep from bursting out laughing.

2.   She turned her back to him and fiddled with a trolley, and bit her cheek till it bled.

3.   I bit my cheeks to keep from saying how wrong I thought they were and how worried I was for her schoolwork.

4.   He sustained fractures to his nose, cheekbone and left leg while, according to the prosecution, Clifford bit his cheek.