3 sentences

1. 旅客们在过关时需要出示护照。

   lǚ​kè men zài guò​guān shí xū​yào chū​shì hù​zhào.

   Travelers need to show their passports when going through customs.

   Source: Dong Chinese Dictionary

2. 这批新产品的质量完全过关，可以投放市场。

   zhè pī xīn chǎn​pǐn de zhì​liàng wán​quán guò​guān, kě​yǐ tóu​fàng shì​chǎng.

   The quality of this new batch of products is fully up to standard and can be put on the market.

   Source: Dong Chinese Dictionary

3. 经过几天的努力，他终于在驾驶考试中过关了。

   jīng​guò jǐ tiān de nǔ​lì, tā zhōng​yú zài jià​shǐ kǎo​shì zhōng guò​guān le.

   After several days of effort, he finally passed his driving test.

   Source: Dong Chinese Dictionary