题目内容

Since advertising can increase sales of production, _____it can _____the price.
A．so; reducedB．so; reduceC．/; be reducedD．/ ; reduce
D
since ‘“因为”和because 一样，不能和so连用。 Can情态动词后跟动词原形。“因为做广告能提高销售量，它能降低成本”
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