--We're going to be ________ a picnic tomorrow. Will you go with us, Joe?--I'd love to, _________ I have to finish my report first.A.for; butB.on; butC.for; andD.to; and
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A解析“go for...”指“去进行……”;而当别人发出邀请时,可先回答“I'd love to”,然后加“but...”来提出自己的理由,本题选A.