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yuanhaiying

1.        Recently there has been increased debate over if a budget surplus should go towards lower taxes or increased spending on social programs.

(A) over if a budget surplus should go towards lower taxes or increased spending

(B) over whether a budget surplus should go towards lowering taxes or increasing spending

(C) about a budget surplus going towards lower taxes or increasing spending

(D) about if lower taxes should come from a budget surplus or spending increases（B）

(E) concerning a budget surplus and its going towards lower taxes or increased spending

黄色部分的用法对吗？

wycg

toward 是介词, 他后面的lower是动词,用了动名词行式.

是对的.