14、add to 增加 add up to 總計達
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 供認
He admitted him mistake at last.考試用書
18、in advance 預先，提早
You should inform(告訴)me in advance if you are going to come.
19、take advantage of = make use of 使用
We can take advantage of computer to analyze data.
A good habit in learning is to make full use of class time.