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?yàn)槿加褪怯邢薜�，而且很多人浪費(fèi)，我們將不得不在家里安裝某種太陽(yáng)能供暖設(shè)備．

解答 答案：C
解析：根據(jù)橫線后面單數(shù)形式的device"設(shè)備"，B、D選項(xiàng)可以直接排除．本題中some意為"某個(gè)"，后面可直接接單數(shù)名詞；或表達(dá)為some type of"某種…"，故本題答案為C選項(xiàng)．

點(diǎn)評(píng) 本題考查數(shù)量的表達(dá)，做此類題目時(shí)先要弄清楚每個(gè)選項(xiàng)的用法再結(jié)合原句從句意和用法幾個(gè)方面確定出正確答案．

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