—What you can do is _______ more English if you want to learn English well.—You mean _______ more English is useful to me?
The old pen is broken, I’d like ______ one to write with.
I’m very glad I have my own room in my house. I ______ do what I want in it.
His Walkman is different from, and it is more expensive.
-How often does he write emails to his friend?-______.
Many young people become interested in playing ______ football because of the World Cup.