I became a teacher 15 years ____. I have been a teacher ____ 1997. I have taught here ___about 15 years .
She has been livingfor ten years.
----the doctor,the most beautiful teacher Zhang Lili is out of danger.
---I won the first prize in the school computer competion. ---- .
In these old days,books could only be produced .
He studies hard,he can pass this English exam.