— I telephoned him twice and I couldn’t get through to him. —The line might have been out of order, _______?
With modern equipment,many mysteries have ____ to light in recent years.
I’d appreciate ____ if you would like to teach me how to use the computer.
My grandma still treats me like a child. She can’t imagine grown up.
At a rough estimate .Nigeria is Great Britain.
Last week, only two people came to look at the house, _______ wanted to buy it