teachers appreciate knowing --- parents are interested in childrens progress
问题描述：
teachers appreciate knowing --- parents are interested in childrens progress
a whose
b how
c that
d what
答
that 因为that是可以连接两个递进关系的分句,whose是指谁的,不符原句,how是如何,不符合,what指什么,同样不符合.所以就是that了