题目

The man pulled out a gold watch,_____were made of small diamonds.     A. the hands of whom         B. whom the hands of     C. which the hands of        D. the hands of which 答案：D 解析: 从四个选项的设置不难看出是考察介词加关系代词引导的非限制性定语从句。再从先行词watch可看出是指物，可排除A和B。C项中关系代词应放在介词之后，如改为of which the hands 也是可以的。选D，意为“……钟的指针是用小钻石做成的。已知a、b满足b=++25，求和3b+2a的值。