他在办公室里忙着写报告。

Tā zài bàngōngshì lǐ máng zhe xiě bàogào.

He is busy writing a report in the office.

下课以后，我们离开教室去吃饭。

Xiàkè yǐhòu, wǒmen líkāi jiàoshì qù chīfàn.

After class, we leave the classroom to go eat.

我们学校有很多教室和实验室。

Wǒmen xuéxiào yǒu hěnduō jiàoshì hé shíyànshì.

Our school has many classrooms and laboratories.