### Ex 3: Choose the word whose underlined part is pronounced differently.

1. **B. sewing** - The 's' in "sewing" is pronounced as /z/, while the 's' in "design," "tennis," and "swim" is pronounced as /s/.

2. **D. knitting** - The 'k' in "knitting" is silent, while the 'k' in "shuttlecock," "skating," and "karate" is pronounced.

3. **D. peach** - The 'ea' in "peach" is pronounced as /iː/, while in "tea," "meat," and "pear" it is pronounced as /ɛə/.

4. **D. machine** - The 'i' in "machine" is pronounced as /iː/, whereas in "routine," "penguin," and "vaccine," the 'i' is pronounced as /ɪ/.

5. **C. damage** - The 'a' in "damage" is pronounced as /æ/, while the 'a' in "waste," "save," and "age" is pronounced as /eɪ/.

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### Ex 4: Write the correct form of the word in brackets.

1. We planned a surprise **celebration** for her birthday. (CELEBRATE)
2. The village was quiet and **peaceful** at sunset. (PEACE)
3. Governments should enforce laws for environmental **protection**. (PROTECT)
4. **Conservation** of forests is essential for wildlife. (CONSERVE)
5. A **reduction** in air pollution improves public health. (REDUCE)
6. Some factories release **poisonous** chemicals into rivers. (POISON)

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### Ex 7: Find the underlined part that needs correction in the following question.

1. They would **like watching** the basketball game **tonight.**
**B.** watching (correct form: "like to watch" or "like watching" is acceptable, but "like to watch" is preferable in this context)

2. There **isn't** too **many** entertainment **in** my hometown.
**C.** many (correct form: "too much" or "not many" should be used with uncountable nouns like "entertainment").

3. We **miss** the **annual** music **festival rarely.**
**D.** rarely (correct form: "rarely miss" to indicate that it's not done often).

4. People **usually** wear **tradition** clothes **during** the festival.
**B.** tradition (correct form: "traditional").

5. Unless we **switch** to renewable **energy,** **global** warming **won't** worsen.
None- There is no error in this sentence.

6. The air **quality** **improved** if factories **reduce** **emissions.**
**B.** improved (correct form: "improves" to match the conditional structure).

7. We **conserve** water **for** future generations **have** **enough.**
**C.** have (correct form: "to ensure" or "to make sure").

Let me know if there's anything else you need help with!