Употребите модальные глаголы could,should,ought to там,где необходимо. 1) when i was young, i very fast. 2) paula go to the meeteng last week. she was ill. 3) when you play tennis, you the ball. 4) if you have time, you ..go to the science museum. it's very interesting. 5) we wait very long for the bus yesterday. we didn't have much time. 6) it is very important that everybody very carefully.
2 couldn't
3 ought to
4 should
5 couldn't
6 should