She ________ a model before she _______ a superstar.
I find it’s ___ hard ___ understand the English movies.
I had some trouble____ complete sentences in learning English.
--How beautiful your skirt is!--_______.
--Hi, Peter. How can you improve your maths so much?--Oh, nothing difficult. The _______ you work at it, the _______ progress you will make.
The old man ___live with his wife, but now he ___ alone after she died .A.used to, is used to live B.used to, is used to livingC. was used to, used to live D used to, used to live