我把头靠在她的肩膀上。

I rested my head on her ___shoulder.

她把手搭在我的肩膀上，吻了我一下。

She put her arm round my ___shoulder and gave me a kiss.

她紧张地回头瞥了一眼肩膀，以确保没有人在听。

She glanced nervously over her ___shoulder to make sure no one else was listening.