—Lucy, when will you plant trees, this Saturday or Sunday?

—      time is OK. You decide.

A．Both

B．Either

C．Neither

D．All

下颌做侧方运动时，同时收缩的肌肉有( )。

A．同侧的颞肌

B．同侧的嚼肌

C．对侧的嚼肌

D．对侧的翼内肌

E．对侧的翼外肌下头