_______ its 'weights' is the Earth's gravitational attraction for the particular mass.. A.When it gives matter B.Matter is given C.What gives matter D.How it is given matter.
A.. A.When B.Matter C.What D.How
【参考答案】
C 解析：疑问词“what”引导的名词从句做主语。例如：1．What he did was morally w......