C. pocket

• Explanation: The underlined "o" in "pocket" has a different vowel sound compared to the other words. In "knock," "key," and "milk," the "o" and "ee" have a different sound compared to the "o" in "pocket."

D. guitar

• Explanation: The "g" in "guitar" is pronounced like a "g" in "give" or "garden" (a soft "g"), whereas in the other words, "g" has a hard sound.

D. fond

• Explanation: The underlined vowel sound in "fond" is different from the other words ("cousin," "interesting," and "link") where the vowel sound is different in the initial syllables.

C. money

• Explanation: The "e" in "money" is pronounced as a short /i/ sound (like "mi"), while the other words have a different vowel sound.

D. climb

• Explanation: The "b" in "climb" is silent, unlike the "b" sounds in "breakfast," "brief," and "bright."

B. cupboard

• Explanation: The "ou" in "cupboard" is pronounced like the "u" in "prayer," making it different from the other words.

My uncle works in __________ coffee plantation in Dak Lak.
Answer: A. a

• "A" is the correct article to use because "coffee plantation" is singular and starts with a consonant sound.

How __________ ethnic groups in Viet Nam do you know?
Answer: C. many

• "Many" is used for countable nouns like "ethnic groups."

You can get __________ information if you go to the museum with me.
Answer: A. a lot of

• "A lot of" is used for both countable and uncountable nouns like "information."