所长正在办公室接电话。

Suǒzhǎng zhèngzài bàngōngshì jiē diànhuà.

The director is answering the phone in the office.

所长每天早上都会开会。

Suǒzhǎng měitiān zǎoshang dōu huì kāihuì.

The director holds a meeting every morning.

昨天的会议是所长主持的。

Zuótiān de huìyì shì suǒzhǎng zhǔchí de.

Yesterday's meeting was hosted by the director.