单项选择题

What invention made milk keep longer in 1851

A．A special milk bottle.
B．A method to take water out of milk.
C．A way to kill bacteria in milk.
D．Machines to fill bottles automatically.
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单项选择题
Why did milk become a big business
A．Because of the development of industry.
B．Because of the pasteurization process.
C．Because of the new discoveries.
D．Because of the increasing number of cattle.
单项选择题
A．He might be late for his chemistry class.B．He might borrow a bike after class.C．He might be delayed in the lab.D．He might ride his bike to the lab.
A．He might be late for his chemistry class.
B．He might borrow a bike after class.
C．He might be delayed in the lab.
D．He might ride his bike to the lab.
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