单项选择题

What is this article about

A．Energy from the sun.
B．How oil is made.
C．Natural gas.
D．Saving energy.
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单项选择题
Solar energy causes
A．less pollution than oil
B．the same pollution as oil
C．more pollution than oil
D．financial problem
单项选择题
The biggest reason for not using more solar power now is ______. A ) money C) space B) time D) pollution
The biggest reason for not using more solar power now is ______. A ) money C) space B) time D) pollution
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