he has / since the exchange / been learning a / a farm / student arrived, / lot about life on
A. Since the exchange student arrived a farm, he has been learning a lot about life on.
B. He has been learning a lot about life on a farm since the exchange student arrived.
C. Since the exchange student arrived, he has been learning a lot about life on a farm.
D. He has been learning a lot about life on since the exchange student arrived a farm.
