2. 外语
  3. To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least

To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least

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问题 To compensate for the substantial decline in the availability of fossil fuels in future years, we will have to provide at least ______ alternative energy source.(2014年北京航空航天大学考博试题)
选项 A、an anticipated
B、an official
C、an equivalent
D、a redundant
答案C
解析 空格应该填入一个冠词+形容词的结构，来修饰后面的能源替代方案。A预期的，期望的：B官方的，正式的，公务的；C等价的，相等的，同意义的；D多余的，过剩的，被解雇的，失业的，冗长的。句意为：为了弥补未来的几年中矿物燃料供应量的大幅度下降，我们将不得不提供至少是一种同等的替代能源。故答案为C。
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