题目

Money might not grow on trees, but scientists have confirmed that gold is found in the leaves of some plants. Researchers from Australia say that the presence of the particles (颗粒) in a eucalyptus (桉树) tree’s leaves shows that deposits (矿藏) are buried many meters below. They believe that the discovery offers a new way to find the valuable metal in difficult-to-reach areas.Dr Mel Lintern said: “We have found a lot of the easy particles in Australia in this way. Now we are trying to find the more difficult ones that are buried tens of meters below. And the trees are providing us —This book is a little hard.  ________read something easier?             —AIl right.               [     ]A. Why don't                      B. Why not to               C. Why don't you                  D. Why not you