2.A

3.B

4.C

5.D

6.A.

7.B

8.B

9.D

10.B

1 1.A

12.(B) I'm not sure about this question, but the exclusion method should be B. I asked my colleagues and they all said that this sentence was well written. The only possibility is this, but it still doesn't go well. Ask your teacher.

13.D

14.B

15.C

16.C

17.D

18.B

19.B

20.C