—I telephoned him twice and I couldn’t get through to him.—The line might have been out of order, _________?
He had a strange hairstyle and he instantly became the ________ of attention the moment he stepped into the classroom.
—How do you find this new movie?—It's ________ interesting than expected.
It took us several hours to make the old man ________ of the safety of travelling by air.
No one can ________ how the election will turn out,as there are many unknown facts.
Anyone who is in ________ of weapons without permission is considered lawbreaking.