Verified answer

Ответ:

He couldn't find his bike because somebody had stolen it.

They bought a new car because they had had the old one for 15 years.

I was scared of flying because I had never flown before.

Everything was white in the morning because it had snowed the night before.

She didn't pass her exam because she had not studied much.

He didn't board the plane because he had lost his passport.

Alex didn't have any money because he had spent it.

She missed the bus because she had not left on time.