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    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 aB．some types of aC．some type ofD．some types of
    C

    试题分析：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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