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题目内容
（国家开放大学英语语法）
I know you’re planning to travel this summer, but do you know __?
A.how much cost it will be
B.how much has it cost
C.how much it will cost
D.how much will it cost
A.how much cost it will be
B.how much has it cost
C.how much it will cost
D.how much will it cost
参考答案