--- I’ll buy you a ten-speed bicycle as a birthday present. --- Is that a _________? I wish you would not disappoint me.A.decisionB.presentationC.preferenceD.promise
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D解析这题考查词义辨析：decision决定，presentation呈现，preference 偏爱，promise许诺，句意是：--我会给你买个十速的自行车做为礼物。--是许诺吗？但愿你不会让我失望。选D。