简答题：根据以下材料回答The reasons why birds don't get lost on their long f

题目内容：
根据以下材料回答

The reasons why birds don't get lost on their long flights_____.
A) have been known to scientists for years
B) have only recently been discovered
C) are known by everyone
D) will probably remain a mystery
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根据以下中文信息写一封电子邮件：假设你是Fox Electronic Comply销售部的总经理Tom Smith，要求

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We appreciate (work) _____with her, because she has a good s

We appreciate (work) _____with her, because she has a good sense of humor.

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