Unit18 Why Learn English?
There are many advantages to learning English.
English is an international language.
If you can speak it, you'll have little difficulty traveling anywhere.
And if you can read it, you can acquire firsthand information about what is going on in the world.
Mastering English,however, can't be done overnight.
It takes time and patience.
To begin with, you should get yourself a good dictionary.
Consult it when encountering a word you don't understand.
Any reading material is fine, but make sure you study for at least two hours every day.
Keep in mind that there are no shortcuts to learning English.
It takes a lot of hard work, but the reward is well worth the effort.
1.There are many advantages to+V-ing ……有很多好处/优点
例句：There are many advantages to doing aerobics.
2.have difficulty+(in) V-ing 从事/做……有困难
例句：Ben has difficulty breathing in Taipei City.
3.To begin with, S+V 首先，……
例句：To begin with, you should read this book on bow to get along with others.
4.firsthand information 第一手的资料
例句：A witness is simply one who reports what he has seen and heard. He shares personal knowledge and firsthand information.