If I ______ about this computer program, a hage amount of time and energy would have been saved. A．k...
2022-12-22 21:10:50 102次 2014届吉林省高二上学期期末考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
If I ______ about this computer program, a hage amount
of time and energy would have been saved.
A．know B．knew C．had known D．have known
本题链接：
