选择之债因有选择的一方行使了选择权而变为简单之债。 ()
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张某和刘某夫妇无子女，后收养李某的幼子为养子。该养子 ()
A. 必须姓张
B. 必须姓刘
C. 必须姓李
D. 可以姓张，可以姓刘，可以姓李
Why was he employed by the firm？ ______.
A. Because he had worked in a computer shop.
Because he had learned to use computers at school.
C. Because he had worked very hard.
D. Because he had written some computer programs.
某大学对严重违反校纪、非法同居的大学生甲、乙予以勒令退学处分，并将处分决定以内部文件形式传达到校属有关单位，师生们对此议论纷纷，该大学的行为 ()
A. 侵犯甲乙的隐私权
B. 侵犯甲乙的名誉权
C. 侵犯甲乙的受教育权
D. 是行使教育管理权的正当行为，不构成侵权行为
下列属于违反合同义务应承担的民事责任方式的是 ()
A. 赔礼道歉
B. 消除影响
C. 恢复原状
D. 赔偿损失
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