——HowmuchshallIpayforthephonecall?——Youdon'thaveto.Thisis_______

发布时间：2020-08-07 01:30:45

——How much shall I pay for the phone call?
——You don't have to. This is ________.A.free of chargeB.god value for moneyC.on my ownD.in no need of payment

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A解析free of charge免费。
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