1.B

2.A

3.C

4.A

5.B

6.C

7.B

8.B

9.B

10.C

11.A

12.B

have

cooks

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1.has painted

2.asking

3. had died

4.cried

5.return

6.reported/had captured

7. had never seen

8.had already given/got

9.have been

10.had studied

11.wrote

12.am having

13.had come/had seen

14.has already seen

15.had not eaten

16.have you read

17.will be interviewing

18.are living

19.had finished 

1. It is the first time we ever have worn uniform

2. This is the first time I ever have cleaned the floor

3. He has never spoken English before

4. She has never driven a car before

5. It is the first time my sister taught Maths

6. Hoa has taught Maths for a long time

7. They have bought this house since 2003