Question

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

Answer 1

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。