Over half of the children ___in one-parent families.A.live B.lives C .has lived D.had lived

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Overhalfofthechildren___inone-parentfamilies.A.liveB.livesC.haslivedD.hadlivedOverhalfofthechildren_

Over half of the children ___in one-parent families.A.live B.lives C .has lived D.had lived
Over half of the children ___in one-parent families.A.live B.lives C .has lived D.had lived

Over half of the children ___in one-parent families.A.live B.lives C .has lived D.had lived
句意为超过一半的孩子生活在单亲家庭里,children单复数同行,half不影响词的单复数,排除B和C.又本句叙述一种现实情况,不能用过去完成时,所以选A