Ifyouneedadvice,Iamalways________

发布时间:2020-07-26 13:59:49

If you need advice, I am always ________.A.at your serviceB.in your serviceC.on your servicesD.over your services

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A解析本题考查的是词组at one's service,意思是:为……服务。另外,还有:be of service to sb对……有用,有帮助。
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