I don’t know why Tom was absent from yesterday’s meeting.—He must have been sick, _______？

I have known him________ I was young.

Perhaps the best sign of _____ computer and internet use pushes up demand for paper comes from the high-tech industry itself

Shean old friend of hers yesterday while she was shopping att the department store.

It’s said that there’re millions of camels in India and ________ of them is still increasing.