There are fewer and fewer tigers in India. The situation will continue ______ humans stop hunting them for their fur and bones.

Suan!Where have you been? You have no idea ___ worried I was.

My new novel has disappeared.Who _______ have taken it?

The old tower must be saved, _______the cost.

There___________ football matches on CCTV5 this evening, aren’t there—Yes, my father and I will watch them.