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题目内容
（平顶山学院-行政管理-大学英语2）
(单选题) Is Tom at school today? No, He’s at home ______ he has a bad cold.( )(本题1.5分)
A. because
B. if
C. until
D. before
A. because
B. if
C. until
D. before
参考答案
