[clarity]

1.It was said ___was all ___they could do in the case.
A. that that ...waht B that that ...that
Cthat what...that D that which... what
I choose B ,but the key is A. I do not know why.


2Air is to us____water is to fish.
Athat B how C what Dwhy
I choose C but they key is A

In China there are some kind of these exercises existing. Sometimes i can not explain to students clearly. sometimes i think the exercise is stupid but they have to do.What a terrible thing. But i will try to reduce them to do this kind of exercise too much. Thanks everybody here for your support and help. thanks in advance。