Fill in the gaps with the correct form of the word or with the correct form of the verb in brackets.

It was a trip I’ll never forget. We (were feeling/was feeling/had feeling)
very excited as we climbed into our bus. With forty
noisy children and three nervous teachers, it was very crowded. I was at (a/the/-)
primary school and our teachers had decided to
organize an excursion to a wildlife park. We found the tour round the park
(fascinated/fascinating/fascinate) because we saw
animals that we had only read about in books before, such as zebras and elephants. We
were delighted to see (their/them/they) in real life.
Anyway, just after we had entered (in/-/into) the part
where the monkeys lived, the bus had a puncture. We (should/must/had)
to stop. While the wheel (had been changed/was
being changed/was changing) a whole
group of monkeys ran to the bus and started (to climbing/climb/to climb)
all over it. We had never felt so excited and we were
shouting for joy. I think that we (wouldn’t enjoy/wouldn’t have enjoyed/hadn’t
enjoyed) our trip so much if the bus hadn’t
had a puncture. Finally, the driver managed to change the wheel and our teachers felt
much happier when we (continued/were continued/would continue)
the tour.