If you are a students you would have to learn english for your own bright future or, at least, pass the exam.
If you are an employee you would have to learn english for the benefit of your career.
Even if you are just a street walker you still want to learn english to understand what's going on in the world....
No matter who you are. Learn English is very important. You can't avoid it and do not avoid it before you getting too far behind.
Feel Free to use this article but only please refer back to http://www.kinglishschool.com
Obstacle = One that stop, hold up or slow down your progess.
Discover = To Learn
Stand for = To represent
Acceptable = Enough to satisfy with
Annoy = To be disturbed
Expose = To subject or allow to be subjected in action, activities or condition
Assume = To suppose
Some sources from http://www.thefreedictionary.com
*Each word can have more than one meaning. The meaning here is just to favor the article