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¡¡¡¡¢ò.¡¡Grammar
¡¡¡¡Directions£º Beneath each of the following sentences there are four choices marked A£¬B£¬Cand D.Choose the one answer that best completes the sentence.
¡¡¡¡21.The news that they failed their driving test discouraged him£¬ ?
¡¡¡¡A.did theyB.didn’t theyC.did itD.didn’t it