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题目内容
（国家开放大学网络实用技术基础）
-______________ ? -The round-trip air fare for a person is only $188.
A、How much does the airplane cost
B、How much does the trip cost
C、What is the exact air fare
A、How much does the airplane cost
B、How much does the trip cost
C、What is the exact air fare
参考答案
