________ is known to us, May 12, 2008 was the day _______ Wenchuan earthquake happened.
I think it was George who said this, ____ ? A don’t I B. doesn’t he C. didn’t he D. wasn’t it
While building a tunnel through the mountain, _______.
_______ book of this writer is East and West.
All the rooms are _______ with electric light.
We waited _______ for the bus.