问题
选择题
—"Is Tom at school today?"
—"No. He’s at home he has a bad cold." [ ]
A. because
B. if
C. until
D. before
答案
答案：A
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—"Is Tom at school today?"
—"No. He’s at home he has a bad cold." [ ]
A. because
B. if
C. until
D. before
答案：A