form 上有格子，让你填名字、地址等。Fill it out 就是在这些格子里写上内容。ID 是证明你身份的卡。
填表
试一试: Woman: Do I write my address in all these boxes? Clerk: Yes. Please ___, and then give it back to me. 选出工作人员会说的话。 (wait in line / fill it out / deliver it) 答案: fill it out — 她要在格子里写地址，所以是填表：fill it out。
单词
发音
例句
form
This form is for the new gym.
fill it out
Can you fill it out, please?
ID
My ID is in my wallet.
在表格上签名
sign 就是用你自己的方式写下名字。你写下的就是 signature。
试一试: Clerk: Here are your new keys. Just ___ here, please. Man: Sure. Where's the pen? 选出工作人员会说的话。 (deliver / mail / sign) 答案: sign — 他拿到钥匙，还要找笔，所以是要在这里签名：sign。
单词
发音
例句
sign
Don't forget to sign it.
signature
My signature is very small.
在邮局
stamp 可以在 post office 买到，买来贴在信上。人很多的时候，你要排队：wait in line。
试一试: Woman: So many people want tickets for this movie! Man: I know. Let's ___ now. 选出那个男人会说的话。 (sign / deliver / wait in line) 答案: wait in line — 很多人都想买票，所以他们要排队：wait in line。
单词
发音
例句
post office
The post office is next to the bank.
stamp
I need a stamp for this letter.
wait in line
We waited in line for an hour.
信件和包裹
Mail 是寄到你家的信和卡片。在邮局把信寄出去，也是 mail。package 是邮寄的盒子。商店可以把东西送到你家：deliver。
试一试: Woman: This sofa is too big for my car. Seller: No problem. We ___ everything in the city. 选出店员会说的话。 (deliver / sign / mail) 答案: deliver — 沙发太大，她的车装不下，所以商店会送货上门：deliver。