Marking the letter for each question:1. Question 1: C. lend   - Explanation: The correct answer, "lend," has a different vowel sound (/ɛ/) compared to the other options (/ɪ/ in mere, /ɛ/ in send, and /ɛ/ in trend).2. Question 2: D. knee   - Explanation: The correct answer, "knee," has a different vowel sound (/ni:/) compared to the other options (/naɪf/ in knife, /ki:p/ in keep, and /ni:/ in know).3. Question 3: B. attractive   - Explanation: The correct answer, "attractive," has the primary stress on the first syllable, while the other options have the primary stress on the second syllable.4. Question 4: C. evolve   - Explanation: The correct answer, "evolve," has the primary stress on the second syllable, while the other options have the primary stress on the first syllable.5. Question 5: A. in   - Explanation: The correct preposition is "in" to complete the phrase "anxious in."6. Question 6: A. witnesses   - Explanation: The correct answer is "witnesses," as it fits the context of the sentence.7. Question 7: A. are discussing   - Explanation: The correct verb tense is "are discussing" to match the present continuous tense.8. Question 8: A. makes   - Explanation: The correct verb is "makes" to match the subject "Peter."9. Question 9: A. will be made   - Explanation: The correct future passive construction is "will be made" for the sentence.10. Question 10: C. discussed    - Explanation: The correct past tense is "discussed" to maintain grammatical consistency in the sentence.11. Question 11: D. wasn't he    - Explanation: The correct tag question is "wasn't he" to match the positive statement.12. Question 12: A. right after the epidemic has been controlled    - Explanation: The correct time expression is "right after the epidemic has been controlled" for the sentence.13. Question 13: C. refer    - Explanation: The correct verb is "refer" to convey the intended meaning in the sentence.14. Question 14: B. heart    - Explanation: The correct body part is "heart" to complete the phrase "cool heart."15. Question 15: A. imply    - Explanation: The correct verb is "imply" to convey the intended meaning in the sentence.16. Question 16: D. to use    - Explanation: The correct structure is "to use" to follow the verb "allowing."17. Question 17: B. Ø (no article)    - Explanation: The correct article is no article "Ø" before "Mount Rainier" because it's a proper noun.18. Question 18: D. created    - Explanation: The correct verb is "created" to maintain tense consistency in the sentence.19. Question 19: B. move on    - Explanation: The correct phrasal verb is "move on" to convey the intended meaning in the sentence.20. Question 20: "I think the school uniform should be the theme of the show."    - Linda: "We have been wearing it for all week, this is a great chance for a change."    - Response: "We have been wearing it for all week; this is a great chance for a change."    - Explanation: The corrected punctuation adds a semicolon to connect the two independent clauses in a more grammatically correct way.
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