在我关电脑之前，我只想检查一下我的邮件。

I just want to check my ___mail before I turn off the computer.

当我到家时，我检查了我的邮件，看是否有朋友的消息。

When I got home, I checked my ___mail for messages from my friend.

我每天都给同事发邮件。

I send ___mail to my colleagues every day.