He doesn't know____to hand in the homework.I'II tell him to do it tomorrow A where B what C which
问题描述：
He doesn't know____to hand in the homework.I'II tell him to do it tomorrow A where B what C which
Dwhen
答
He doesn't know____to hand in the homework.I'II tell him to do it tomorrow A where B what C which
选D
因为后面说了
【I'II tell him to do it tomorrow】告诉的是一个时间
所以前面用when