The Chinese University of Hong Kong, founded in 1963, ______ 50 in 2013.
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A
passes
B
becomes
C
turns
D
grows
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 Every year _____ money and energy is spent on environment protection. 
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A
large quantities of
B
a large number of
C
a large quantity of
D
a plenty of
 They sold ______ boxes of such sweets last week.
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A
four dozens of
B
four dozen
C
four dozen of
D
four dozens