A

$\text{a, /x-1/-/x-2/-/x-5/=5x+1 với 1≤x ≤5}$ $\text{b, /5x-3/+/y-1/=0}$

26. “Don’t get your shoes dirty, boys,” she said.

She told the boys not to get their shoes dirty

27. “What do you want for lunch today, Peter?” Mary asked.

Mary asked what Peter wanted for lunch that day.

28. “Can I borrow your typewriter, Janet?” asked Peter.

Peter asked Janet whether/ if he could borrow her typewriter.

29. “Why didn’t I get a computer before?” thought the office manager.

The office manager wondered why he hadn’t got a computer before.

30. “You had better not lend him any more money, Elizabeth,’’ said John.

John advised Elizabeth not to lend him any more money.