Because fuel supplies are finite and many people are wasteful, we will have to install ______ solar heating device in our home.
A、
some type of
B、
some types of a
C、
some type of a
D、
some types of
【正确答案】
A
【答案解析】
some在这里意思是“某一，某种”，相当于“a certain”，排除B、D，type of后接名词，即使是单数形式也不加a/an，故选A。
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