We consider ____ absolutely necessary that we should open our door to the outside world.

The story _________ is not interesting, but why it has so many readers？

.One advantage of eating a balanced breakfast is _____ it can keep you energetic throughout the day.

Have you seen ____Audi car I parked here?—Is it _____ black one? A young man has driven it away.

__________ have you been in the sports club?—Since the first month I came to the school．