These provide extra, non-essential information.
In Test A, the reading passage usually centers on a famous inventor or a breakthrough in modern technology. Solutions Third Edition Unit 9 Progress Test A Answers
Focuses on advanced grammar and reading comprehension related to advertising and music Reading Comprehension (Text 1) These provide extra, non-essential information
Boxes out of cardboard because it's a cheap material. Concrete won't be used as much in the future. Nylon was developed in the 1930s. The glass window has been broken . Plastic will be recycled more in the future. Rubber was discovered many years ago in South America. Wood is burned to heat buildings. Vocabulary: Materials & Objects 4. stone 5. copper 6. gold 7. leather Use of English (Multiple Choice) 1. b 2. c 3. d 4. a 5. c 6. a 7. b 8. c Intermediate: Unit 9 Progress Test A Grammar: Third Conditional & Participle Clauses Concrete won't be used as much in the future