New words：

surround [sə'raund]
v.环绕；包围；围绕；围住
n.周围；(物品的)边，饰边

Sample Sentences：

Tall trees surround the lake.
The lake is surrounded with/by trees.
Police, drop your weapons, you are surrounded.Freeze!
We'll surround the place. They will have to come out when they run out of food and water.

New words：

pitch black [pitʃ] adj. 漆黑的；漆黑一片
pitch dark adj. 漆黑的；漆黑一片

Sample Sentences：

Outside it was pitch dark and it was raining cats and dogs.
To them Chairman Mao shone as a star in the pitch-black night.
Standing in the pitch black, we had no idea what our surroundings looked like.

surrounding [sə'raundiŋ] n. 环境；周围的事物

New words：

elf [elf] n.（故事中的）精灵
elves [elvz] elf复数

Sample Sentences：

I'm a human, but I was raised by elves.
My little daughter is as lovely as an elf.
An elf is sitting between the green branches and leaves lost in thought.

New words：

concert ['kɔnsət] n.音乐会；演奏会

Sample Sentences：

The concert will raise money for local hospitals.
The first arrivals at the concert got the best seats.
The children are too young to sit through a concert.

New words：

loads of [ləud] adj. 大量；许多

Sample Sentences：

I've got loads of things to do today.
She missed loads of lessons because she was ill.
Loads of people were taking pictures and some were definitely Chinese.