Word: 保管 (bǎoguǎn)

至于该文件，我在保管。

Zhìyú gāi wénjiàn, wǒ zài bǎoguǎn.

As for the papers, I have custody of them.

请保管好自己的财物。

Qǐng bǎoguǎn hǎo zìjǐ de cáiwù.

Please keep your belongings safe.

请妥善保管你的证件。

Qǐng tuǒshàn bǎoguǎn nǐ de zhèngjiàn.

Please keep your documents in a safe place.

这把钥匙请你先替我保管一下。

Zhè bǎ yàoshi qǐng nǐ xiān tì wǒ bǎoguǎn yíxià.

Please keep this key safe for me for now.

钥匙请妥善保管，别弄丢了。

Yàoshi qǐng tuǒshàn bǎoguǎn, bié nòngdiū le.

Please take good care of the key and don't lose it.