Itisnotdecided________theconferencewillbeheld.
C
A 什么 B 哪一个 C 什么时候 D (无词义)
The conclusion from the study is not definite; it is just ________.
Ifyouarewalkingawayfromaclocktower，youwillhearthetickingoftheclockfadetoapoint________itcannotbeheard.
Theconclusionfromthestudyisnotdefinite;itisjust________.
Lyingundertheskull,thehumanbraincontainsanaverageoftenbillionnervecellscalled______.