单项选择题

A lot of work used to ______ human physical energy , now becomes a kind of enjoyment.

A．injure
B．exhaust
C．desert
D．abandon
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单项选择题
One thing food industry must do is to print on the package the ______ the food contained otherwise it is not accepted by the public.
A．ingredients
B．elements
C．components
D．factors
单项选择题
As a teacher, you shouldn't be ______ to any of the kids, they should share equal care.
A．partial
B．impartial
C．impolite
D．polite
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