The house has changed hands again.

这幢房子又换了主人。

　　change hands:change ownership（财产等）转手；易手
　　再如:
　　That shop has changed hands no less than three times during the past three years.
　　在过去3年里，这商店至少转手3次了。

Why do you always try to nose into others'affairs？

你为什么总想打听别人的事？

　　nose into:enquire inquisitively into sb.'s private affairs 探听（某事）
　　再如:
　　She's always nosing into other people's business.
　　她老是爱打听别人的私事。

We like to do our laundry on Sunday.

我们喜欢在星期天洗衣服。

How did you learn of my name？

你是怎么知道我的名字的？

　　earn of:come to hear about听说
　　再如:
　　I learnt of your success in the newspaper.
　　我从报纸上得知你成功的消息。

The sun really did a number on my face!

太阳真把脸晒坏了！

　　动词搭配do a number on sth/sb..，英文的解释是，to hurt or damage something，即，伤害，毁坏。
　　例句：
　　This case has really done a number on Dad ?
……

We enclose a cheque for RMB200.

我们附上人民币200元的支票一张。

　　固定搭配get cold feet，英文的解释是to become nervous or anxious and then change your mind about a decision，即，因为太紧张或太担心而改变已经作出的决定。
……

--浅谈英语常态课的教学