问题补充:
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
答案:
A. some type of a
B. some types of a
(答案→)C. some type of
D. 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。