Which of the following is discussed in the passage?( )
A.Using cloth napkins. B.Changing your light bulbs. C.Altering your commuting habits. D.Saving water.(对)正确答案D
Which of the following is discussed in the passage?( )
A.Using cloth napkins. B.Changing your light bulbs. C.Altering your commuting habits. D.Saving water.(对)正确答案D