All ( )they have done is good for me .填that 还是what

All ( )they have done is good for me .填that 还是what i am__to my parents for all that they have done for me应该填哪个单 All-----they have done is good for us A What B which C why D 从句,连接词all that they have done is good for us.这句话为什么用that,为什么 I am grateful for all _____you have done for me.what taht 还是 all that we have is what we have done for others. All ___they have done is good for us. Thank you for all the things that you have done for me? All ____ you have to do is to press the button.填 What 还是that i don't know _ good they could have done.A.howB.that C.what they will be thankful for （ ）you have done A what B that C w My mother is pround of all that{what ,which } I have done 为什