问题
单项选择题
We are sending you ______ the samples for the new season.
A．under separate post
B．by separate post
C．under separate mail
D．by separate cover
答案
参考答案：B
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We are sending you ______ the samples for the new season.
A．under separate post
B．by separate post
C．under separate mail
D．by separate cover
参考答案：B