His friends ignored his advice, ______ they knew it to be helpful.A．as ifB．since_刷题宝

题干

His friends ignored his advice, ______ they knew it to be helpful.

A．as if

B．since

C．even if

D．so that

上一题下一题 0.64难度单项选择更新时间:2012-12-27 03:11:35

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