Because fuel supplies are finite and many people are wasteful, we will have to i

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问题 Because fuel supplies are finite and many people are wasteful, we will have to install______solar heating device in this building.

选项 A、some type of
B、some types of a
C、some type of a
D、some types of

答案 A

解析 some用法题。some除了有“一些”的意思以外，还有“某种”的意思，在这里应该取这个意思，后面的名词用单数type of，排除B、D。而device是不可数的，前面不加a，因此选择A，排除C。

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