Question

What they have done___of great use to us.What he s

What they have done___of great use to us.What he says and what he does ___agree.A.is；notB.is；do not C.are；does not D.are；not
选什么，为啥

Answer 1

选 : D. are; not
What they have done are of great use to us. ( they 使用复数 are )
What he says and what he does not agree. ( 他所说与他所做不符合。)

Answer 2

引用wonder_learn的回答：
选 : D. are; not
What they have done are of great use to us. ( they 使用复数 are )
What he says and what he does not agree. ( 他所说与他所做不符合。)

What they have done这是个从句啊