The government policies provided an impetus to this areas growth.
A.an incentive to
B.an obstacle to
C.a reason for
D.an assistance to
正确答案:A
A项anincentiveto“刺激诱因”和animpetus“推动力”的意义接近其他词语anobstacleto“障碍”areasonfor“原因”和anassistanceto“帮助”则与句中短语animpetus的意义截然不同