单项选择题

A．Walking in the garden.
B．Milking the cows.
C．Chasing the cows.
D．Preparing breakfast.
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单项选择题
According to the McCain-Lieberman bill:
A．Nuclear power is the only renewable energy for the time being.
B．Solar energy and wind energy are more expensive than nuclear energy.
C．The development of nuclear power will help with the alleviation of global warming.
D．The dependence on fossil fuels is risky for the nation.
单项选择题
Ports have to establish a common language of trade.
A．Y
B．N
C．NG
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