b1.

1.My sister hasn't finished her exams

2.Have you played this new computer game

3.My dog has broken its leg.

5.My parents have been to New York.

6. My cousin has appiled for a new job.

b2

2. asked                                                                         

3. took

4. met

5. used

6.saw

7.did

8.reached

9.stopped

10.put

11.was/were

12.spent

3.

1.have dropped

2. have bought

3.have been- have not spent

4. has stopped

5.have had

6.Have you met

7.have he had

8.have lived

b4.

1. for

2.since

3.for

4.for

5.since

1.My sister hasn't finished her exams

2.Have you played this new computer game

3.My dog has broken its leg.

5.My parents have been to New York.

6. My cousin has appiled for a new job.

Bài 2.

2. asked                                                                         

3. took

4. met

5. used

6.saw

7.did

8.reached

9.stopped

10.put

11.was/were

12.spent

Bài 3

1.have dropped

2. have bought

3.have been- have not spent

4. has stopped

5.have had

6.Have you met

7.have he had

8.have lived 

Bài 4 

 1.for

2.since

3.for

4.for

5.since

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