in orDEr to (AttAin) our oBjECtivE, it is (EssEntiAl) thAt wE (will mAkE) thE BEst usE oF thE limitED rEsourCEs (AvAilABlE).
A．AttAin
B．EssEntiAl
C．will mAkE
D．AvAilABlE