13. Please don't lose it and bring it when you come every time.
请不要遗失，每次来时带着它。
还能这样说：
Keep it well and take it whenever you come.
Please don't lose it and take it with you when you come each time.
应用解析：
bring about 引起;致使;使康复;
bring in 产生利益;介绍;引述;
bring oneself to 奋力;下决心
14. This is your registration card.
这是你的挂号证。
还能这样说：
Here is your registration card.
Your registration card.
应用解析：
registration number 机动车登记号码;
registration fee 挂号费;登记费;
commercial registration 商业注册(登记)
15. It won't take you much time to register.
挂号花不了你多少时间的。
还能这样说：
Registration may cost you a little time.
You will spend a short time to register.
应用解析：
be too much for one 非力所能及，干不了;应付不了;
make much of 重视;充分利用;夸奖;
as much as one can do 尽最大努力;
as much as to say 好像是说，等于说
16. Many people are lining up for registration.
许多人在排队挂号。
还能这样说：
A great many of people are waiting on line to register.
A large number of people are queuing for registration.
应用解析：
all along the line 全部地;到处;
drop sb. a line 给某人写信;
in line for sth. 有可能获得某事物
17. May I make an appointment with a doctor now?
现在可以预约门诊吗?
还能这样说：
Could I get a treatment at this moment?
Can I get an appointment right now?
应用解析：
doctor oneself 自我治疗;
doctor up 掺假窜改;粉饰;
Doctor Fell引起自己反感的人