ItwasonlyafterWorldWarIIhaddrawntoaclose______intheUnitedStates.A.d

It was only after World War II had drawn to a close ______ in the United States.A.did the baby boom beginB.that the baby boom beganC.when the baby boom beganD.then the baby boom began

B解析试题分析：：考查强调句型。本题考查强调句型：it is/was被强调成分that/who…；强调句型的最大特点是把it is/was…that/who…去掉句子仍然成立。本题强调的是主语only after World War II had drawn to a close句意：只有在第二次世界大战结束后，美国人口出生快速增才开始。故B正确。考点：考查强调句型。点评：本题考查强调句型：it is/was被强调成分that/who…；强调句型的最大特点是把it is/was…that/who…去掉句子仍然成立。这题不要和only+状语+倒装句混起来，因为只有only+状语在句首才倒装。

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