There is no doubt that___ the mother is most concerned about is the health of her children.A.thatB.whatC./D.whether
问题描述:
There is no doubt that___ the mother is most concerned about is the health of her children.
A.that
B.what
C./
D.whether
答
B.what
what the mother is most concerned about他妈妈最关注的,做宾语