问题
选择题
Recently some studies have found that learning ___________ second language can lead to __________ increase in one’s brain power.
A．a; the
B．不填; the
C．a; an
D．the; an
答案
答案：C
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Recently some studies have found that learning ___________ second language can lead to __________ increase in one’s brain power.
A．a; the
B．不填; the
C．a; an
D．the; an
答案：C
