The key to exercise solutions in chapter 09 - Language focus 2 for the textbook Cutting Edge Intermediate - Student's Book with authors Sarah Cunningham, Peter Moor and Jonathan Bygrave from Pearson Education
Question
Are these pairs of sentences the same or different?
Answer
different: too much has a negative meaning; a lot of does not have a negative meaning
different: enough means you have as much as you need; plenty of means 'more than enough'