(2014届湖南省怀化市高三第一次模拟考试英语试卷) We used to mistake that heavy objects fell faster than light .
There is some doubt_______ he can win the first prize.
It is _____ that the Chinese ping-pong team will win the prize.
Could you tell me_________________?
In my opinion, the film is ______worth _______a second time.
The class will _______on some important matters.