_____hespeakssoftlyisnoproofthatheiskind.
C
that 做主语从句 he speaks softly 的引导词，没有实际意义。
Both of my brothers are now married ，so I have two_____.
Childrenwhoareover-protectedbytheirparentsmaybecome_____.
He‘sworkinghard_____.
He didn‘t seem to mind_____the music while he was studying.