In his lecture, the professor referred to the belief, in contrast to all other countries, ______the elderly are wise, ______is particularly dominant in the Chinese culture.
Charles Darwin considered ______ to be the process by which evolution took place.
_________, what you did is right. So don’t be worried about it any more.
In our school students are ________ according to how much they know and how old they are.
He is not a(n)________, only a(n) ___________.
The September 11 attack has been _____ by the entire international community.