The boy the father worked in the USA is Jack.A. whoseB. of whomC. whoD. whom

问题补充：

The boy the father worked in the USA is Jack.

A. whose

B. of whom

C. who

D. whom

答案：

A. whose

(答案→)B. of whom

C. who

D. whom

解析：考查定语从句。本定语从句的先行词是the boy，whom指代the boy在句中做of的宾语，of whom可以放在the father的后面。句意：那个父亲在美国工作的男孩是Jack。故B正确。