治疗结核病的首选药物是（）
A. 庆大霉素
B. 青霉素G钾
C. 链霉素
D. 土霉素
E. 强力霉素
When did the man graduate
A. Nothing.
B. Dinner.
C. A snack.
D. Oranges.
When will the next bus leave for Boston
A. The woman is sick.
B. The woman is confident.
C. The woman is worried about her exam.
D. The woman is anxious.
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