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I've been working on a studying plan these days, because it's my last year in high school and I'll apply for a university next year.
I know if I want to get a ticket for get in a famous and good university, I must have to study efficiently, so I made a plan. Now I'm trying myself to get used to it and work on it.

My Chinese teacher always told us to value our time. She said that study it's not the only but the easiest way that we can do now to achieve success in the future.

Please help me correct this passage and give me some comments.
Thanks a million
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I've been working on a study plan these days, because it's my last year in high school, and I'll be applying for admission to a university next year.
I know if I want to get into a good, well-known university, I have to study efficiently, so I've made a plan. Now I'm trying to get used to it and work on it.

My Chinese teacher always told us to value our time. She said that, while studying may not be the only way, it is the easiest way to take action now to achieve success in the future.

CJ
Comments  
I know if i want to get a ticket to get in a famous and good university i have to study......

You don't use must and have to together. You must choose one. and My Chinese teacher always tell us.....

not always told us, i thought.
 CalifJim's reply was promoted to an answer.