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3.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

分析 因为燃油是有限的,而且很多人浪费,我们将不得不在家里安装某种太阳能供暖设备.

解答 答案:C
解析:根据横线后面单数形式的device"设备",B、D选项可以直接排除.本题中some意为"某个",后面可直接接单数名词;或表达为some type of"某种…",故本题答案为C选项.

点评 本题考查数量的表达,做此类题目时先要弄清楚每个选项的用法再结合原句从句意和用法几个方面确定出正确答案.

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