New words：
tourist ['tuərist] n. 游客；旅游者；观光者visitor ['vizitər] n. 来访者；访问者；参观者；游客traveller ['trævlə] n. 旅客；旅行者；游客handbook ['hændbuk ]n. 手册；指南
Sample Sentences：
London is full of tourists in the summer.
The park attracts 2.5 million visitors a year.
The traveller's face was covered with insect bites.
We bought a tourist handbook before going travelling.
New words：
complaint [kəm'pleint] n. 投诉；抱怨；控告；不满的原因
Sample Sentences：
I have no complaints about the hotel.
I'd like to make a complaint about the noise.
We received a number of complaints from customers.
If you want to make a complaint, please press three.
New words：
complain [kəm'plein] v. 抱怨；投诉；埋怨；发牢骚
Sample Sentences：
You've got nothing to complain about/of.
He complained that the exam was too hard.
The tourist complained that the room was too dirty.
tourist ['tuərist] n. 游客；旅游者；观光者
New words：
program [ˈproʊɡræm] n.节目；计划；【计】程序；课程programme['prəugræm] n. 节目；程序；方案
program 是美式英语的拼写方式
programme 是英式英语的拼写方式
Sample Sentences：
The program is under way.
In this class, students will learn how to program.
You can cut and paste between different programs.
There is an interesting program on television tonight.
We have had a string of complaints about the program.
complain [kəm'plein] v. 抱怨；投诉；埋怨；发牢骚complaint [kəm'pleint] n. 投诉；抱怨；控告；不满的原因
New words：
administer [əd'ministər] v.执行；管理；治理administrate [əd'ministreit] v. 管理；支配administrator [əd'ministreitər] n.管理员；管理人员；系统管理员
Sample Sentences：
It takes brains to administer a large company.
Don't shout in the library. You will be kicked out by the administrator.
An administrator is the person who administrates or administers a large program or project.
program ['prəugræm] n.节目；计划；【计】程序；课程