婴儿把头靠在她的肩膀上。

The baby laid his head on her ___shoulder.

然后她把胳膊搭在我的肩膀上，说一切都会好起来的。

Then she put her arm around my ___shoulder and said everything would be OK.

她紧张地越过肩膀回头看，以确保没有别人在听。

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