1-5 ACBCA 6-10 CCBCC 11-15 BACBA 16-20CABCB
21-25 BABAA 26-30 BCBCB
31-35 BABBC 36-40 CABAA
52. She explained her reasons to the stores.
53.Where is Jim?
54.When did he go there?
55.Has he ever been there before?
56.Who did he travel with
57.How long will he be away
58. machines 59. brought 60. has 61. drinking 62. pollution
63. like 64.countries 65. their 66. other 67. less
68.He has bee a teacher since two years ago.
69.We should stop people from cutting down trees.
70.Reading books in the sun is harmful to our eyes.
One day, I was walking home after school.On my way home ,I saw awoman throwing something onto the ground. The ground looked so dirty at once.So I picked up the waste at once and threw it into the stbin .Thinking that I had to find a way to stop the bad behavior,I brought out a piece of paper and wrote a notice which said,"Please don't litter onthe ground !"Then I hung the notice on the branch of a tree.Seeing the notice ,the woman's face turned red.She said to me ,"I'm sorry .You are a good boy."After that ,I went home happily.