holds the greatest variety of microclimates, plants and animals in the world.

This human and natural diversity produces a rich cultural interaction among different people, a variety of occupational patterns and use of spaces, and a spectacular fusion of cultures and landscapes. Thus, Peru has an enormous potential as a privileged tourist attraction capable of offering visitors a wide variety of options all year round.

T: Thank you for your information. We don't have enough time to share all you have found about Peru. I hope you can share with each other after class.

Step Ⅱ Language study

Deal with exercises about useful words and expressions.

T: Now please open your books and turn to Page 40. Let's do some practice with the some useful words and expressions in the text.

Ask the students have finished them, check the answers.

Then deal with the exercises in USING WORDS AND EXPRESSIONS on Pages 80-81.

Step Ⅲ Grammar

T: In Unit 4, we revised the restrictive attributive clause. Today, let's revise the non-restrictive attributive clause. Look at the screen. Here is a form about the restrictive attributive clause and non-restrictive attributive clause. Please tell the differences between them.

Show the following form on the screen.

Restrictive Attributive Clause Non-restrictive Attributive Clause

1. We will always remember the days that we spent in the village. 1. John, who was sitting on my left, said that this meal was the best he had ever had.

2. Anyone who breaks the law will be punished. 2. He was late again, which made his teacher very angry.

S: The extra information is necessary in the restrictive attributive clause. The extra information can be left out in the non-restrictive attributive clause.

S: We don't use commas with the restrictive attributive clause. We use commas with the non-restrictive attributive clause.

S: We never use "that" in the non-restrictive attributive clause as relative pronoun.

Give a summary of the non-restrictive clause.

Relative pronouns in non-restrictive clauses

Person Thing Place

Subject who / which

Object who / whom which where

Possessive whose

Notes:

1. In the non-restrictive clauses, you cannot use "that" instead of who, whom or which.

2. You cannot leave out the relative pronoun, even when it is the object of the verb in the relative clause:

He gave me the letter, which was in a blue envelope.

He gave me the letter, which I read immediately.