When we start gazing into the night sky with a telescope, soon we’ll be astonished by the realization _______ we and our world are part of this giant system.A.whichB.whetherC.thatD.as
网友回答
C解析考查同位语从句。we and our world are part of this giant system.是realization的同位语，that在从句中不做成分。