It was not until the entrance exams were in sight that ____ that I had so many books to cover
and so many exercises to finish.

When I try to understand ______ that prevents so many Americans from being as happy as one might expect,
it seemed to me that there are two causes.

Was it because of the heavy snowstorm in Europe _____ the flight had to be put off?

The police were looking into the accident, hoping to find out _______ that had caused it.

It was not until yesterday _____ I realized how important English was.

It wasn't until nearly a month later _____ I received the manager's reply.

— Well. I do think the rabbit is a beautiful, gentle animal which can run very fast.
— ______.

An accident ______ happen in the street a week ago.

It was in New Zealand _____ Elizabeth first met Mr. Smith.