题目内容
从所给的四个选项中选择最佳答案
John, don't speak ______.
[ ]
A. when you are speaking to
B. while you are speaking to
C. until you are spoken to
D. when you are spoken
答案:C
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题目内容
从所给的四个选项中选择最佳答案
John, don't speak ______.
[ ]
A. when you are speaking to
B. while you are speaking to
C. until you are spoken to
D. when you are spoken