问题
选择题
According to a new survey carried out by an American university, learning______ second language can result in_______ increase in the power to learn your native tongue.
A．a; the
B．不填; the
C．a; an
D．the; an
答案
答案：C
“a second language”泛指一们第二外语; 后面的increase作名词讲, 是可数名词, 前面需加不定冠词an。