题干
— What advice can you give me on learning English?
— I think you can join English club.
A：a
B：an
C：the
D：/
答案(点此获取答案解析）
B
— What advice can you give me on learning English?
— I think you can join English club.
A：a
B：an
C：the
D：/
的前n项和为
，若
，
，则
（ ）
