They kept trying _____ they must have known it was hopeless.A．ifB．becauseC．whenD_刷题宝

题干

They kept trying _____ they must have known it was hopeless.

A．if	B．because
C．when	D．where

上一题下一题 0.85难度单项选择更新时间:2010-06-20 08:49:24

答案(点此获取答案解析）

小学学科试题库

初中学科试题库

高中学科试题库