Question

Before they got into the bus, all the seats ____ occupied

• A. were
• B. have been
• C. would have been
• D. had been

Answer 1

Answer:

D. had been

We use the past perfect continuous to talk about actions or events which started before a particular time in the past and were still in progress up to that time in the past. So here in this example, All the seats were occupied until the time when they got into the bus.