New Words：

crawl [krɔːl] v. 爬；爬行；匍匐行进

Sample Sentences：

We learn to crawl before we learn to walk.
He watched the baby crawl across the room.
A man was crawling away from the burning house.

New Words：

reason [ˈriːzn] n.原因；理由；道理

Sample Sentences：

She gave no reasons for her decision.
He said no but he didn't give a reason .
Give me one good reason why I should help you.
We have reason to believe that he was murdered.

New Words：

succeed [səkˈsiːd] v.成功;达到目的;实现目标;办到;做成

Sample Sentences：

Our plan has succeeded.
If you work hard you will succeed.
If at first you don't succeed, try, try again.
To everyone's surprise, the plan succeeded.

New Words：

doubt [daʊt]
v.怀疑；不相信；不能肯定；无把握
n.疑问；疑惑；不相信；不确定

Sample Sentences：

No doubt I will succeed in the end.
There is no doubt at all that we did the right thing.
Without doubt, she is the best nurse in the hospital.

I had no reason to doubt him.
I do not doubt that he will succeed.
I doubt if he'll listen to advice from me.

succeed [səkˈsiːd] v.成功;达到目的;实现目标;办到;做成
reason [ˈriːzn] n.原因；理由；道理

New Words：

flood [flʌd]
n.洪水；水灾；
v.淹没；泛滥；（使）灌满水；大量涌入

Sample Sentences：

Their bedroom was flooded with sunshine.
The morning sunlight flooded into the room.
Japanese cars have flooded the American market.

The flood was too deep to drive through.
The town was destroyed by the floods after the storm.
In 1975, the floods in that area made 233,000 people homeless.