New words：

tradition [trə'diʃən] n. 传统；惯例

Sample Sentences：

By tradition , children play tricks on 1 April.
They broke with tradition and got married quietly.
For many people, sending holiday cards is a tradition.
There's a tradition in our family that we have a party on New Year's Eve.

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