69.Who can help children stay away from the bad influence on the 　 Internet ?

68.Why shouldn’t children sit in front of a computer for a long time ?

67. What do the parents tell children to do when they meet strangers on the street ?

66.Is the Internet educational all the time ?

64.In the 1970s

63.No.

62. The people in Germany put their rubbish into different bags

61.Germany(德国)and northem European countries work very hard to improve the environment.

65.What does the “Green”movement　 try to do?

[答案]