Einstein’s Theory of Relativity was so __________that few people could understand it at that time.
Yi Siling was the first Chinese athlete _____ the gold medal in the London Olympic Games.
Philip isn’t ______ at all; he always pays the bill when we eat in a restaurant.
In many countries, ______ good education is regarded as ______ key to success in the future.
--Come in, please. Make yourself at home. -- _________. -- I’m glad you like it.
--- I think you should phone Jenny and say sorry to her. --- ___________. It was her fault.