New Words：

several [ˈsevrəl] pron. 几个;数个;一些

Sample Sentences：

He's written several books about India.
He will have to stay in hospital for several days.
Several of the paintings were destroyed in the fire.

New Words：

prove [pruːv] v. 证明;证实

Sample Sentences：

I'll prove to the world that he was right.
Just give me a chance and I'll prove it to you.
I can prove to you that he is not telling the truth.

New Words：

require [rɪˈkwaɪər] v. 要求;需要

Sample Sentences：

The roof requires repairing.
I require a seat by the Window.
All passengers are required to show their tickets.

New Words：

disease [dɪˈziːz] n. 病;疾病
diseased [dɪˈzizd] adj. 有病的；患病的

Sample Sentences：

It is not known what causes the disease.
More than 400 people a year die of this disease.

The plant is diseased and will soon die.
We must cut away the diseased branches from the trees.

New Words：

loyalty [ˈlɔɪəlti] n. 忠诚；忠实
previous [ˈpriːviəs] adj. 先前的；以往的；上一个；前一个

Sample Sentences：

He has a heart of loyalty to the people.
He doesn't have to prove his loyalty to you.
This showed his love and loyalty to his motherland.

When did the previous train leave? 30 minutes ago.
What do you like and dislike about your previous job?

prove [pruːv] v. 证明;证实