单项选择题

The biggest reason for not using more solar power now is ______. A ) money C) space B) time D) pollution
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单项选择题
In the next few years, the price of gas will ______.
A．come down
B．stay the same
C．go up
D．ebb and flow
单项选择题
What does this article suggest
A．Oil companies are against solar energy.
B．Many people are afraid of solar energy.
C．Solar energy might ease the energy problem.
D．Shortage of natural gas.
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