The cost of call will______.A、rise after the changeB、remain unchangedC、reduce

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问题 The cost of call will______.

选项 A、rise after the change
B、remain unchanged
C、reduce after the change

答案 B

解析关键词语：Will the cost of calls change?Oh，no．Don’t worry about that．所有的电话号码升级都是不收费的。故B是正确答案。

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