If our marketing plan succeeds we the sales by thirty percent next year.A. would increas

问题补充：

If our marketing plan succeeds, we the sales by thirty percent next year.

A. would increase

B. will increase

C. would have increased

D. will be increasing

答案：

A. would increase

(答案→)B. will increase

C. would have increased

D. will be increasing

解析：如果我们的营销计划成功，我们明年销售将增加百分之三十。If条件句使用的是一般现在时代替一般将来时，所以主句也是一般将来时，和next year搭配使用。所以选B。