After Lincoln was made president of the United States, he insisted on the slaves. . A /;

发布时间：2020-08-16 19:11:02

After Lincoln was made      president of the United States, he insisted on the slaves    . .                                                                        A /; be set free   B /; being set free   C the; setting free   D the ; being set free

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解析：第一空考查冠词的用法，在头衔前不用冠词。第二空insist on后接动词ing形式。
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