When ____ help, one says "Thank you" while when _____ help, one asks "Can I help you?

题目简介

When ____ help, one says "Thank you" while when _____ help, one asks "Can I help you?

题目详情


When ____ help, one says "Thank you" while when _____ help, one asks "Can I help you?"
A.ffered; offeredB.ffering; offeredC.offering; offeringD.offered; offering
题型:单选题难度:偏易来源:不详

答案

D

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