giúp mình bài này với

* Cấu trúc câu điều kiện loại 2

If S + V(ed/ cột 2), S + would/ could + V

If + S + didn't + V, S + wouldn't/ couldn't + V

- Use: Không cso thật ở hiện tại 

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`31.` If I had a spare ticket, I could take you to the concert.

`32.` If they understood the problem, they could find a solution.

`33.` If he didn't sit a round too much, he would be fit.

`34.` If Carol weren't studying, she would answer the phone.

`35.` If he polished his shoes, he would look smart.

`36.` If I knew her email address, I could tell you.

`37.` If he stopped his car, he would see the signal.

`38.` If Peter prepared his lessons well, he wouldn't get bad marks.

`39.` If Mary had enough money, she could buy a new car.