• 您入境时填写的报关表/单呢？Nín rùjìng shí tián de bàoguānbiǎo/dān ne? Where is your customs declaration when you entered China? [Here 呢 means where.]

• Sb. 忘了把sth.交给sb.了。Sb. wàng le bǎ sth. jiāo gěi sb. le. Sb. forgot to give sb. sth. [The '把' construction is commonly used under this kind of situations.] 

   E.g. 1. 我忘了把报关表交给您了。2. 我忘了把书还给图书馆了。

• 对，就是这个！Duì, jiù shì zhè ge! Right, this is it!/ Right, this is the one!
  

• 交原价200%的税 Jiāo yuánjià 200% de shuì  Pay 200% of the original price tax.

• 我干吗（要）…? wǒ gàn má (yào)…? Why should I ... ?

• 你有没有sth.的证明（呢）？nì yǒu méiyǒu sth. de zhèngmíng ?  Do you have any proof ...?

• Sth.上（没有）说…Sth. shàng (méiyǒu) shuō… It does not say in…[ ‘上’ is short for 在...上]

      E.g. 证明上没有说您的摄像机被偷了。

• 请把箱子打开，我看看。Qǐng bǎ xiāngzi dǎkāi, wǒ kànkan. Please open your luggage. I need to check [lit. I'll have a look.]

• 我箱子里没有要报关的东西。wǒ xiāngzi lǐ méiyǒu yào bàoguān de dōngxi. There is nothing needs to declare in my luggage.

• 您买的这些东西都有收据吗？Nín mǎide zhèxiē dōngxi dōu yǒu shōujù ma? Do you have receipts for these things that you have bought?

• 没有sth怎么行！Méiyǒu sth. zěnmexíng! It won't do without sth.

      E.g.没有收据怎么行（啊）！

• 请问，哪儿有换钱的？Qǐngwèn, nǎr yǒu huànqián de? Where can I exchange money?

• 把one currency换/换回 another currency bǎ one currency huàn/huàn huí another currency. Exchange one currency (back) to another currency.

E.g.  1. 把人民币换英镑。2. 把英镑换回人民币。