关于provedeWeshallreduceourpricestothelevelinyourcounter-offeryouincreaseyourquantityto1,000metrictons.a.providedforb,provedethatc,providedifd,provided但我觉得应该选C,请帮我判断一下,是不是答案错了

Question

关于provede
We shall reduce our prices to the level in your counter-offer ______ you increase your quantity to 1,000 metric tons.
a.provided for b,provede that c,provided if d,provided
但我觉得应该选C,请帮我判断一下,是不是答案错了,如果是我错了,请详细说明原因.

Answer 1

答案就是d
provided本身就表示假设的意思,是连词conj,意思是以...为条件;假如.不需要再用if条件状语从句了.
例如：
Provided (that) there is no opposition,we shall hold the meeting here.
假如无人反对,我们就在这里开会.