Viết lại câu cho phù hợp

----- Nội dung dịch tự động từ ảnh -----
. Study hard or you won't pass the exam.
=> If......
20. Don't be impatient or you will make mistakes.
=> If.......
21. I didn't eat lunch, I feel hungry now.
=> If I.....
22. If you want my advice,I would't buy it.
=>lfI . ..
23. I only come if they invite me.
=> unless.......
24. He didn't revise all his lessons, he failed the exam.
=> If he.....
...
25. The park is over there, only 5 minutes' walk.
=> If you walk.....
26. In case it rain, we'll stay at home
=>lf it ....