题干

The reason ________ he explained was________ he was ill and unable to go to school.
A.why; thatB.why; becauseC.which; becauseD.which; that
上一题 下一题 0.85难度 单项选择 更新时间:2011-12-01 09:37:23

答案(点此获取答案解析)