问题
选择题
20. In many places in China, ____ bicycle is still _____ popular means of transportation.
A．a; the
B．/; a
C．the; a
D．the; the
答案
答案：C
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20. In many places in China, ____ bicycle is still _____ popular means of transportation.
A．a; the
B．/; a
C．the; a
D．the; the
答案：C