busy后面加什么介詞

　　He wouldn't come ─ he said he was too busy.

　　他不愿來，他說他太忙。

　　The line is busy ─ I'll try again later.

　　占線——我過會兒再打。

　　I'll be too busy to come to the meeting.

　　我會很忙，不能到會。

　　Should anyone call, please tell them I'm busy.

　　如果有人打電話來，請告訴他我正忙著。

　　Try to get some rest ─ you have a busy day tomorrow.

　　休息一下吧——你明天還要忙一天呢。