37. Save wood and paper or we’ll destroy our forests some days. 

• If___________________________________________________________________________________

38. Thinking of making toys from used paper was his interesting idea.

• It’s interesting that_____________________________________________________________________

39. The river is too dirty for us to swim in.

• As__________________________________________________________________________________

40. Phong was very good at swimming.

• Phong_______________________________________________________________________________

ĐỀ THI THỬ SỐ 31 KỲ THI TUYỂN SINH VÀO LỚP 10