I. New Words.
- soot (n) /sʊt/ : ___________
- melt (v) /melt/ : ___________
- crop (n) /krɒp/ : ___________
- soil (n) /sɔɪl/ : ___________
II. While - listening.
Task 1: Listen and choose the correct answer:
1. Most of the soot in your environment comes from____________.