p+6, p+8, p+12, p+14 nguyên tố 
p = 5k+r 
xét như trên thấy r không thể là 1, 2, 3,4 
r = 0 => p = 5k nguyên tố => p = 5 
các số là 5, 11,13,17,19 nguyên tố 

1. Trung is a student.

2. His last name is Phan.

3. His birthday is on August 15^th

4. He lives at 2/34 Nguyen Trai Street.

5. No, it isn't.

6. There are five room.

7. There are flowers in the yard.

8. Yes, he does.

refrigerator chứ không phải refrigeretor bạn nhé