Ответ:

Перевод задания: Дополните предложения, используя третий тип условных предложений.

В третьем условном предложении используется конструкция: if + had + V3, would have + V3.

  1. If she hadn't missed the bus, she wouldn't have been late.
    (Если бы она не опоздала на автобус, она бы не опоздала.)
  2. I would have had a higher test score if I had completed the project.
    (У меня была бы более высокая оценка за тест, если бы я закончил проект.)
  3. If we hadn't accepted the offer, we wouldn't have experienced such problems.
    (Если бы мы не приняли предложение, мы бы не столкнулись с такими проблемами.)
  4. If you had driven carefully, you wouldn't have hit the car in front of you.
    (Если бы ты вёл машину осторожно, ты бы не врезался в автомобиль впереди.)
  5. I wouldn't have gone there if I had known whose party it was.
    (Я бы не пошёл туда, если бы знал, чья это была вечеринка.)

Ответ: 1) hadn't missed, wouldn't have been; 2) would have had, had completed; 3) hadn't accepted, wouldn't have experienced; 4) had driven, wouldn't have hit; 5) wouldn't have gone, had known.