问题
选择题
It takes us _____ hour or more to go to my hometown by _____ train. [ ]
A. an; a
B. a; an
C. an; 不填
D. a; 不填
答案
答案：C
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It takes us _____ hour or more to go to my hometown by _____ train. [ ]
A. an; a
B. a; an
C. an; 不填
D. a; 不填
答案：C