Itisnousearguing_______theplanbecauseithasbeenrejected.
C
argue 作动词时，意为 “争论;争吵;争辩 ”。argue for 意为 “为 …… 辩护 ” ;argue with sb about / over sth 指 “就某事和某人争论 ” ;argue against意为 “据理反对;争辩 ……”。根据句意，应该用 for。
Notuntilrecently_____thatThompsonhadbentellingthetruthallalong.
I'd like to remind you that there is no_____on the part of suspects to answer questions.
It is important to ________ your skin from the harmful strong sunlight.
After months of voyage, Columbus arrived in ______ later proved to be a new continent.
It is no use arguing _______ the plan because it has been rejected.