我国能够大量引进国外优良的动植物品种，并能找到适合的生长地区，是因为[ ]

A．国土广大

B．平原面积辽阔

C．地形复杂多样

D．气候复杂多样

The man _____ you are going to make friends is my father's neighbor.   [      ]

A. with whom        

B. when              

C. to whom          

D. which