题干


It has been widely accepted that only when the students take an active part in the class activities _______ the most effective.
A.teaching will beB.will teaching be
C.has teaching beenD.teaching has been
上一题 下一题 0.85难度 单项选择 更新时间:2010-06-08 11:24:11

答案(点此获取答案解析)