问题
选择题
Since advertising can increase sales of production, _____it can _____the price.
A．so; reduced
B．so; reduce
C．/; be reduced
D．/ ; reduce
答案
答案：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”