单项选择题

Americans eat ______ as they actually need every day.

A．twice as much protein
B．twice protein as much twice
C．twice protein as much
D．protein as twice much
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单项选择题
The British are not so familiar with different cultures and other ways of doing things, ______ is often the case in 'other countries.
A．as
B．what
C．so
D．that
单项选择题
Professor Taylor' s talk has indicated that science has a very strong ______ on the everyday life of non-scientists as well as scientists.
A．motivation
B．perspective
C．impression
D．impact
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