当老师宣布开始上课时.班长应该说: A. Sit down, please.B. Good morning, teacher.C. Stand up, please!D. Thank you, tea——青夏教育精英家教网—

题目内容

当老师宣布开始上课时，班长应该说：

A. Sit down, please.
B. Good morning, teacher.
C. Stand up, please!
D. Thank you, teacher.

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