По временам 1)my friend entered the medical institute last year 2)al

По временам 1)my friend entered the medical institute last year 2)al students take exams in winter 3)the delegation will leave Tomsk on Monday 4)do you receive letters from your friends? 5)the students of our group attend all the lectures 6)some students failed their entrance exams 7)the lecture will last two hours 8)shall we go to the disco in the evening? 9)he was good at mathematics,but the failed in physics