1. because of

2. because

3. because of

4. because

5. because of

6. because

7. because of

8. because of

9. because

10. because of 

2. secretary 

1. A

2. D

3. C

4. A

5. B

6. B

7. B

8. D

9. A

10. B

1. We live in a house on Nguyen Du street

2. Close your book and stand up

3. Trang lives with her sister in the city

4. How many teachers are there in your school? 

còn câu 3 :))?