On account of fuel supplies being finite and many people being wasteful, we will have to i

On account of fuel supplies being finite and many people being wasteful, we will have to install solar heating device in our home.
A. some type of a
B. some types of a
C. some type of
D. some types of

A. some type of aB. some types of a(答案→)C. some type ofD. some types of解析：考查some和冠词的用法：句意：因为燃油是有限的，而且很多人很浪费，我们将不得不在家里安装某种太阳能供暖设备。这里some是某个，后面接单数名词，some type of+名词不需要冠词，选C。

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