1. able ability enable capable be able to do能够做…
have the ability to do 能够做，有能力做…：
He has the ability to make very good boat.
enable ** to do 使…能做…：
Internet has enabled us to get information from all over the world.
Be capable of 能够做…：He is capable of drawing oil painting.
He is able to read and write in English.
2. absent 反义词：present
3. abroad 国外，海外：live ~ go ~
Many young people are eager to go abroad to study.
4. access:入口，途径；机会，权利。Have access to sth
Citizens in the town all have access to the books in the local（当地的）library.
5. absorb 吸收 be absorbed in 全神贯注于…
All the students are absorbed in Professor's lecture on China's economy.
6. accept 接受 receive 收到（不一定接受）
She received a gift from him,but she didn't accept it.
7. by accident=by chance 偶然地 on purpose 故意地
8. according to 根据
According to the article,environmental pollution has been taken under control.
9. take…into account=take…into consideration 把…考虑在内
I hope my teacher will take into account my illness when he grades our test paper.
She gave an account of what he saw in China.
10. accuse ** of sth = charge ** with（for）sth 指责…做了…；指控…犯了…
He was accused of robbing the bank and sentenced ten years in gail.
His mother charged him with being lazy.
11. be accustomed to = be used to 习惯于后接 sth 或 doing sth
used to 过去有过去常常后接 do sth
Mr. Smith is not used/accustomed to driving on the right.
I'm already used to the life here.
There used to be a house near the river.
He used to get up while he was in the middle school.
12. achieve 获得，达到
You will achieve nothing if you waste your time this way.
13. adapt=adjust 适应~ adopt 收养；采用
You should adapt to college life as soon as possible.
He adjusted himself very quickly to the weather in the country.
14. add to 增添 add up to 总计达
15. in addition（to）=besides 此外
In order to master a foreign language,we should learn some grammar. In addition,we'd better learn some words.
17. admit 承认
He admitted him mistake at last.
18. in advance 预先，提前
You should inform（通知）me in advance if you are going to come.
19. take advantage of = make use of 利用
We can take advantage of computer to analyze data.