(一).I just had time to pop in. 我抽空来看一眼.
原音重现：

A：Hi, Randy. I'm surprised to see you here.
喂，兰迪，想不到会在这里看到你。
B: I just had time to pop in for a visit.
我只是抽空来看一下。

(二).Who is it? 谁呀？

原音重现：

A：Who is it?
谁呀？
B: It's the mailman. I have a letter for you.
我是邮递员，有你的信。