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题目内容
（国家开放大学-法学本科-人文英语3）
_________, the number of private cars will increase sharply in the coming couple of years.
选择一项：
A. Undoubtedly
B. Doubtedly
C. Undoubted
选择一项：
A. Undoubtedly
B. Doubtedly
C. Undoubted
参考答案
