单项选择题

The writer doesn't believe that ________.

A．packages for hamburgers are polluting many big cities
B．hamburgers will remain popular for the following 100 years
C．the meat in hamburgers can cause health problems
D．cattle raising leads to the destroying of rainforest

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单项选择题According to the passage, a large number of children can be saved only when ________。

A．the life-saving ways are medically effective
B．their parents are rich enough for the life-saving techniques
C．the life-saving techniques are easy to use
D．their parents learn the life-saving techniques

单项选择题When the mixture is used, it is important to ________.

A．keep sugar and salt in water
B．drink it as often as necessary
C．take it as much as possible
D．use it to kill the bacteria