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I  1b   2d    3a   4c      5d

II  1d    2b     3c     4a     5a

III 

1b       2a      3c      4d        5a       6b       7a      8c

9d      10c     11a      12c       13b      14d      15b

IV

1. Because the teachers and most of his classmates are new.

2. They are all nice/ friendly to him.

3. His favourite subject is computer studies.

4. He wants to join the judo club.

5. Yes, he is.

I:

1: b

2: d

3: a

4: c

5: d

II:

1: d

2: b

3: c

4: a

5: a

III:

1: b

2: d

3: d

4: d

5: d

6: b

7: a

8: c

9: d

10: c

11: a

12: b

13: b

14:d

15: b

IV: 

16: Because the teacher was all new to him, most of his classmates were new two

17: They are all nice to him 

18: His favourite subject is maths, geography and computer studies

19: He wants to join the judo club

20: Yes, he is