如果你没有带证件，就不能进图书馆。

Rúguǒ nǐ méiyǒu dài zhèngjiàn, jiù bù néng jìn túshūguǎn.

If you don't bring your ID, you can't enter the library.

请出示一下你的学生证。

Qǐng chūshì yíxià nǐ de xuéshēngzhèng.

Please show your student ID.

办手机卡需要带身份证。

Bàn shǒujīkǎ xūyào dài shēnfènzhèng.

You need to bring your ID card to get a SIM card.