13. He asked the director's permission to take a day off.
他请求主任批准他一天假。
还能这样说：
He asked the director if he could have a day off.
He begged the director's allowance of his taking a day off.
应用解析：
grant permission 准许；
withdraw permission 撤销许可；
ask for permission 请求允许；
procure permission 得到同意

14. I have a headache, so I'm calling in sick today.
我头痛，所以我就打电话来请病假了。
还能这样说：
I have a pain in my head, so I make a phone call to have a day off.
I have a headache and want to ring up to go sick.
谚语：
Hope deferred makes the heart sick.
希望迟迟未实现，使人心烦意缭乱。

15. My daughter is seriously ill, so I need to take care of her at home.
我的女儿病得很厉害，所以我要在家里照顾她。
还能这样说：
My daughter is terribly ill and I need to look after her at home.
I want to see to my sick daughter.
谚语：
It is an ill wind that blows nobody any good.
世上鲜有绝对的坏事。

16. Don't forget to bring a doctor's note tomorrow.
记着明天把医生开的证明拿来。
还能这样说：
Please remember to bring the doctor's note in tommorw.
You need bring the doctor's note in tomorrow.
应用解析：
go over notes 复习笔记；
mental note 心里记住，牢记；
of note 著名的，非凡的；
arrange one's notes 整理笔记；
pen a note 写一张便条；
note sth. down 记录某事

17. I've been busy with work for a long time and need a rest.
我忙了好长一段时间，需要休息休息。
还能这样说：
I have worked for a long time and should have a rest.
I am on the wing of work for a long time and need take a break.
应用解析：
rest assured 放心；
at rest 不动；
come to rest 自然停止；
rest on one's laurels 满足于既有的成绩而不思进取；
rest with sb. to do sth. 做某事是某人的责任；
put sb.'s mind at rest 使某人放心