问题
选择题
_____, water can be changed into gas.
A.Heated
B.Being heated
C.Having heated
D.Having been heated
答案
答案:A
句子的主语是water,因此加热的动作是被动的;being heated是正在加热;having been heated是加热完之后;而heated没有时间概念,表示条件。
_____, water can be changed into gas.
A.Heated
B.Being heated
C.Having heated
D.Having been heated
答案:A
句子的主语是water,因此加热的动作是被动的;being heated是正在加热;having been heated是加热完之后;而heated没有时间概念,表示条件。