Tom has been reading for 2 hours, he has read 44 pages so far.
Rachel has been travelling for three months , she has visited six countries so far.
Patrick has won the national championship four times, he has been playing tennis since he was ten.
Lisa and Sue have made five films since they left college, they have been making films since they left college.
1 have you been playing 2 has broken 3 have you been working 4 have you ever worked 5 has she gone 6 haven’t been waiting 7 has stopped 8 have lost - have you seen 9 have been reading - haven’t finished 10 have read
пусть расстояние от зареченска до азс х км, тогда расстояние от азс до ивантеевки 7х км. составим уравнение: х + 7х = 800
8х = 800
х = 100
от зареченска до азс 100 км пути. т.к. расход бензина на 100 км составляет 9 л, а бензина имеется 10 л, следовательно машина доедет до азс и еще 1 л бензина останется.