Unit One Human and Nature Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing Unit Two Wealth Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing Unit Three Modern Communication Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing Unit Four Business World Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing Unit Five Success Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Clunese Part Ⅳ Writing Unit Six Advertising and Media Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Clunese Part Ⅳ Writing Unit Seven Beverage culture Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing Unit Eight Job Hunting Section One Practice for Passages Word Building Vocabulary and Structure Reading Comprehension Section Two Exercises for PRETCO Part Ⅰ Vocabulary and Structure Part Ⅱ Reading Comprehension Part Ⅲ Translation-English to Chinese Part Ⅳ Writing