i think our sewing machine needs__________again a.to be repaired b.repairing c.being repaired为什么选B不选A

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ithinkoursewingmachineneeds__________againa.toberepairedb.repairingc.beingrepaired为什么选B不选Aithinkours

i think our sewing machine needs__________again a.to be repaired b.repairing c.being repaired为什么选B不选A
i think our sewing machine needs__________again a.to be repaired b.repairing c.being repaired
为什么选B不选A

i think our sewing machine needs__________again a.to be repaired b.repairing c.being repaired为什么选B不选A
Because you suppose to put 'repairing' in front of 'again' and not saying to be repaired again.if that make sense.
hope that help!