1. A. swimming B. wonder C. crown D. waterfall
The words "wonder", "crown", "waterfall" are stressed on the first syllable, so we have to choose the word stressed on the second syllable, which is "swimming".
Answer: A. swimming
2. A. intention B. revision C. decision D. express
The words "revision", "decision", "express" are stressed on the second syllable, so we have to choose the word stressed on the third syllable, which is "intention".
Answer: A. intention
3. A. house B. sound C. youth D. south
The words "house", "sound", "south" have the diphthong /aʊ/ , while "youth" has the consonant /θ/.
However, "youth" has the vowel sound /u/. So the word that differs from the others in underlined part is the word with the vowel /u/, which is not an option, or with the consonant /θ/, which is also not an option. But if we have to choose the one with the diphthong that differs the most, we can choose the one with the consonant that differs the most, which is /θ/. So the word that differs from the others is "youth".
Answer: C. youth
Another option is that the words "house", "sound", "south" end with the sound /aʊs/, /aʊnd/, /aʊθ/, while "youth" ends with the sound /uθ/. So the word that differs from the others is the word that doesn't end with /aʊ/, which is "youth".
Answer: C. youth
4. A. environment B. invention C. convenient D. prevent
The words "environment", "invention", "convenient" have the prefix "in-" /ɪn-/, while "prevent" has the prefix "pre-" /prɪ-/.
However, the words "environment", "invention", "prevent" have the stress on the third syllable (for "environment" we can say that it has the stress on the second and the third syllable), while "convenient" has the stress on the third syllable but the prefix "in-" /ɪn-/ doesn't have the same sound as the prefix "in-" /ɪn-/ in the other two words, or we can say that the words "environment", "invention" have the prefix "in-" /ɪn-/, while "convenient" has the prefix "con-" /kən-/.
So the word that differs from the others is the word with the prefix that differs the most, which is "convenient".
Answer: C. convenient
Another option is that the words "environment", "invention" have the prefix "in-" /ɪn-/, while "convenient" has the prefix "con-" /kən-/.
So the word that differs from the others is the word with the prefix that differs the most, which is "convenient".
Answer: C. convenient
5. A. dream B. create C. break D. meaning
The words "create", "break", "meaning" have the stress on the second syllable, while "dream" has only one syllable.
However, the words "create", "break" end with the sound /eɪt/, /eɪk/, while "meaning" ends with the sound /ɪŋ/. So the words that differ from the others in underlined part are the words that end with /eɪ/, which are "create", "break".
However, "dream" has only one syllable. So the word that differs from the others in underlined part is the word with one syllable, which is "dream".
Answer: A. dream
Another option is that the words "create", "break", "meaning" have the stress on the second syllable, while "dream" has only one syllable.
So the word that differs from the others in underlined part is the word with one syllable, which is "dream".
Answer: A. dream
6. A. tourism B. decide C. invite D. polite
The words "decide", "invite", "polite" have the stress on the second syllable, while "tourism" has the stress on the first syllable.
However, the words "decide", "invite" end with the sound /aɪd/, /aɪt/, while "polite" ends with the sound /aɪt/. So the words that differ from the others in underlined part are the words that end with /aɪt/, which are "invite", "polite".
However, the words "decide", "invite", "polite" have the stress on the second syllable, while "tourism" has the stress on the first syllable.
So the word that differs from the others in underlined part is the word with the stress on the first syllable, which is "tourism".
Answer: A. tourism
Another option is that the words "decide", "invite" end with the sound /aɪd/, /aɪt/, while "polite" ends with the sound /aɪt/. So the word that differs from the others in underlined part is the word that ends with /aɪd/, which is "decide".
Answer: B. decide
7. A. tradition B. occasion C. vacation D. nation
The words "tradition", "occasion", "vacation" have the stress on the second syllable, while "nation" has the stress on the first syllable.
However, the words "tradition", "occasion", "vacation" have the stress on the second syllable, while "nation" has the stress on the first syllable.
So the word that differs from the others in underlined part is the word with the stress on the first syllable, which is "nation".
Answer: D. nation
Here are the best answers for each question:
1. D. who
2. B. picked up
3. C. knew
4. A. into
5. A. tomorrow
6. C. Earth
7. B. itinerary
8. C. up
9. D. Google Maps
10. A. diversity
11. C. private
12. A. outer space
13. A. to review
14. B. to explain
15. A. taking
16. B. Global warming
17. B. Climate change
18. A. habitat loss
19. C. have seen
20. A. whose
21. A. follows
22. C. should revise
23. B. features