—Why are you looking so disappointed, Ken?—The outdoor concert for tomorrow will be put o

—Why are you looking so disappointed, Ken?
—The outdoor concert for tomorrow will be put off.
A. planned
B. planning
C. to plan
D. to be planned

(答案→)A. plannedB. planningC. to planD. to be planned解析：本题考查非谓语动词的用法。过去分词短语作后置定语表示动作的完成，且表示被动。

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