25. They have lived here for two years.

⇒They moved to here two years ago.

26.You should turn unwanted lights off, or you will waste a lot of electricity.

⇒If  you turn unwanted lights off, you won't waste a lot of electricity.

27. Let’s write about the three Rs?

⇒Why not write about the three Rs?

28. Learning about recycling is fun.

⇒It’s fun to learn about recycling.

EM ĐÃ THI CHƯA NÊU CHƯA THÌ CHỊ CHỨC EM THI TỐT NHA ~^_^~

NÊU EM CHƯA THI THÌ CHƯC EM HỌC GIỎI LUÔN ĐẠT ĐIỂM CAO TRONG HỌC TẬP NHA  OoO         OvO∡

25. They moved to here two years ago.

26. If you turn unwanted lights off, you won't waste a lot of electricity.

27. Why not write about the three Rs?

28. It's fun to learn about recycling.

- $Answered_{}$ $by_{}$ $thieukhue_{}$ -