单项选择题

The new regulation does not go into ______ until the first of July.

A．effort
B．effect
C．affect
D．influence
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单项选择题
C
单项选择题
According to scientists, if the energy in the atmosphere were put under our control, what would happen
A．We have an inexhaustible supply of energy from it.
B．This could bring the world to an energy crisis.
C．The sources of energy on Earth would become unreliable.
D．We find ourselves in difficult position with environmental pollution.
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