A bottle weighs more after air is put in. ___________proves that air -考呗网题库移动版
英语三级B级
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单选题 A bottle weighs more after air is put in. ___________proves that air has weight.

A．We             
B．Which         
C．It             
D．What

参考答案C
解析: 【答案】C
【译文】瓶子装入气体后会增重，这说明气体是有重量的。
【考点】it的用法
【解析】it在这里代表前面所提到的事实。故选C。注意区分A bottle weighs more after air is put in．It proves that air has weight．(两个句子)与A bottle weighs more after air is put in，which proves that air has weight(一个句子)。
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