New words：

customary [ˈkʌstəˌmeri] adj. 习俗的；习惯的

Sample Sentences：

It is customary to offer a drink or a snack to guests.

Do you really think it's customary to tip the waiters?

It is customary to eat Zongzi during the Dragon Boat festival.

tip [tɪp] v. 翻倒；给…小费

New words：

custom [ˈkʌstəm] n. 习俗；风俗；光顾；（个人的）习惯

Sample Sentences：

It was her custom to rise early.

It is the custom in that country for women to marry young.

The programme was about customs in different parts of the country.

New words：

squeeze [skwiz]
v.挤压；挤出；捏；（使）挤入
n.挤压；塞；捏；榨出的液体

Sample Sentences：

If you move forward a little, I can squeeze past.
He took off his wet clothes and squeezed the water out.

Give the tube another squeeze.
It was a tight squeeze but we finally got everything into the case.

New words：

menu [ˈmenju] n. 菜单；

Sample Sentences：

Waiter, I'd like to see the menu again, please.

Please press enter key when you see the main menu on the screen.

Choose 'printer' from the menu and click with the right mouse button.

New words：

course /kɔːrs/ n. 课程；讲座

Sample Sentences：

She is planning to take a computer course.

The course will help me look after the children.

Students have a free choice of courses in their final year.