单项选择题

According to the passages acid rain _________.

A．adds minerals to the grain
B．travels with the prevailing westernly wind
C．leads to birth defects in fish
D．and its formation have been fully understood
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单项选择题
Which of the following is the most primary reason for the formation of acid rain
A．Chemical processes in the atmosphere.
B．Dry gases and particulates.
C．The burning of coal and oil.
D．The prevailing wind.
单项选择题
The most appropriate interpretation for the first two sentences in the fourth paragraph is that the French government _________.
A．does not take seriously the voters’concern for the declining family values
B．cannot offer any effective medicine to save the declining family values
C．has come to the end of its resources and is therefore desperate
D．pretends to be doing something good to make people accept its tight budget
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