There are two caps on the table belongs to Tom.A. the smaller of whichB. the small of th

问题补充：

There are two caps on the table, belongs to Tom.

A. the smaller of which

B. the small of that

C. the smaller of them

D. the small one

答案：

(答案→)A. the smaller of which

B. the small of that

C. the smaller of them

D. the small one

解析：句意：在桌子上有两顶帽子，其中比较小的那顶是汤姆的。这里是非限制性定语从句，that不能引导非限制性定语从句，故排除B；又因为逗号前后都是句子，所以缺少连词，故排除CD；which在从句中作主语，故选A。