Supply the correct tense form of the verbs in brackets (chia động từ)

I. Supply the correct tense form of the verbs in brackets (chia động từ)
Mr. Jones (be) …………………………………………principal of our school since last year.
Mr. Smith (teach) …………………………………………at this school since he (graduate) …………………………………………in 1980.
John (drive) …………………………………………that car ever since I (know) ………………………………………… him.
I (not see) him since last Monday.
We (not live) in England for two years now.
George (work) at the university so far.
My father (not smoke)  for 5 years.
How long Bob and Mary (be) married?
You (receive) any letter from your parents yet?
My brother (join)  the army when he (be) young.