1) ham, sausage, salmon, c

Solution:

The task is to complete the list of words using only the vocabulary of this lesson and paying attention to the first letters to guess the words. The words provided are: ham, sausage, salmon. The first letter of the next word is 'c'. Based on common food vocabulary, a likely word is 'cheese'.

1. ham, sausage, salmon, cheese;

Answer: cheese