It was terribly windy last night and there was ___18-degree drop in ___temperature.

问题描述:

It was terribly windy last night and there was ___18-degree drop in ___temperature.
A.a;/ B./;/ C.an;/ D.an;the
第二空为什么?

名词在使用到的时候都是有所指的,the temperature就是指明了是“当时的温度”。。。可是这样一来很多句子都可以是特指啊,我怎么知道他特指还是泛指在说到一类事物时,不需要指明,泛指的时候可以用a,或复数形式,否则就用定语去特指,如:the book , my book ,the small book等,你多看、多记,见得多了,自然就好了。