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If their marketing plans succeed, they ____ their sales by 20 percent.
A.will increaseB.have been increasingC.have increasedD.would be increasing
A
题意是“要是他们的市场计划成功了,他们将增加20%的销售额”。从句是一般现在时表将来,主句常用一般将来时或情态动词can/may + 动词原形。如:If we get up early tomorrow morning, we may/can see the sunrise.
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