5、 --____It’simportanttoprotectourenvironment. A.SodoI.B.Withpleasure.C.That’sOK.D.Soitis.( ) 11.I____ afraid of the dark, but now I don’t.A. use toB. used toC. use to beD. used to be( )12The earth is ________yearsold.A. four thousands six hundredsB. four thou
6、sand six hundredC. four thousand and six hundred millionD. four thousand six hundred millions()13.Theclassroom______byuseveryday.A.iscleaningB.iscleanedC.cleansD.clean()14.Englishisdifferent____French_____spellingandpronunciation.A.from,onB.in,inC.from,inD.with,for()