题干
— Is Jack at school today?
— No. He's at home ______ he has a bad cold.
A：or
B：because
C：but
D：so
答案(点此获取答案解析）
B
— Is Jack at school today?
— No. He's at home ______ he has a bad cold.
A：or
B：because
C：but
D：so
