单项选择题

A．To check the accuracy of scales.
B．To calculate the density of other metals.
C．To observe changes in the atmosphere.
D．To measure amounts of rainfall.
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单项选择题
A．Susan is a fast worker.B．Susan did Jack’’s homework.C．Susan didn’’t do the homework on her own.D．Susan has not finished her homework.
A．Susan is a fast worker.
B．Susan did Jack’’s homework.
C．Susan didn’’t do the homework on her own.
D．Susan has not finished her homework.
单项选择题
A．People are basketball fans.B．People think this game is too violent.C．People didn’’t know this game well.D．People didn’’t have enough money to see football games.
A．People are basketball fans.
B．People think this game is too violent.
C．People didn’’t know this game well.
D．People didn’’t have enough money to see football games.
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