Choose the word from the box and fill in the text. listen to, understand, learn, have to, improve, study, know

I want to my (1) English. That's why l (2) to work hard at it. I have to (3) how to read. I have to learn many words to (4) English better. l have to do many exercises to (5)
English. And, of course, I have to (6) spoken English to understand English better. I am sure, it can all help me to (7) English.