_____opportunity has not found any sign of life, the presence of water means lif

题干

_____opportunity has not found any sign of life, the presence of water means life is possible．

A．While	B．Because
C．When	D．Since

上一题下一题 0.64难度单项选择更新时间:2016-02-29 02:42:40

小学学科试题库

初中学科试题库

高中学科试题库