单项选择题

If you find it difficult to ______ , please stop me any time.

A．snatch up
B．summon up
C．catch on
D．watch out
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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
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
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