.has finished the task ahead of time will be rewarded though we don’t know who It will be.

问题补充：

.has finished the task ahead of time will be rewarded,though we don’t know who

It will be.

A. Those who

B. Anyone

C. Whoever

D. Who

答案：

A. Those who

B. Anyone

(答案→)C. Whoever

D. Who

解析：可联系答.案.网客服索取。