— Is everything ____ we need to do ____?

— Yes. You needn't worry about it.

1. A.
   which; has done
2. B.
   which; doing
3. C.
   that; has done
4. D.
   that; done

1--Is everything __ we need to do __?

--Yes. You needn't worry about it.

A. which; has done     B. which; doing   C. that; has done D. that; done