_______ has finished the work ahead of time will be rewarded though we don’t know who it will be.A.Those who B.AnyoneC.Whoever D.No matter who
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C解析本题考查定语从句中的主谓一致问题。若选A的话,那先行词就是those,who指代those且在从句中作主语,那么从句的谓语应该是复数形式。若选B则在句中会出现两个谓语。D项只能引导让步状语从句,而不能引导主语从句。