4 2.7 Look at the words from exercise 3b. Listen to the presenter's introduction again and circle the letter in each word which is not pronounced. 1 autumn 2 know 3 schools 4 write 5 guitar 6 foreign 7 listeners

4. Identifying unpronounced letters:

Based on standard English pronunciation, here are the letters that are typically not pronounced or are silent in the given words:

• 1. autumn (the 'u' is pronounced, but the 't' is often reduced or elided in rapid speech, depending on accent. However, typically all letters are pronounced in 'autumn'. Let's assume the exercise is looking for the silent 'n' in 'autumn' which is not pronounced in the 'n' sound itself, rather than the letter 'n'. Given the context, it's likely looking for the silent 'n' in the word 'autumn' which is not fully pronounced as a distinct sound after the 'm'.) In this case, there isn't a silent letter. The question might be flawed or refer to a specific pronunciation in the audio not present here. However, if we must choose, we assume it refers to the final 'n' sound being very soft.
• 2. know (The 'k' is silent.)
• 3. schools (All letters are pronounced.)
• 4. write (The 'e' is silent, making the 'i' long.)
• 5. guitar (All letters are pronounced.)
• 6. foreign (The 'g' is silent.)
• 7. listeners (All letters are pronounced.)

Note: The prompt asks to 'circle the letter'. Without the ability to interact with the image, I'm listing the silent letters. The audio from 2.7 is crucial for confirming which specific unpronounced letters are intended.

Assuming the intended silent letters are:

• 1. autumn - no clearly silent letter (assuming question refers to soft 'n' sound)
• 2. know - k
• 3. schools - no silent letter
• 4. write - e
• 5. guitar - no silent letter
• 6. foreign - g
• 7. listeners - no silent letter

Final Answer based on common silent letters in English:

2 - k, 4 - e, 6 - g.