填空题


【参考答案】

which→who
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填空题
weak→strong或powerful
单项选择题
A．The process involved in the creation of fossil fuels.B．The uses for different types of fossil fuels.C．The methods for finding fossil fuels.D．The measures taken to protect fossil fuels.
A．The process involved in the creation of fossil fuels.
B．The uses for different types of fossil fuels.
C．The methods for finding fossil fuels.
D．The measures taken to protect fossil fuels.
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