Exercise 5: Mark the letter A, B, C, or D on your answer sheet to indicate the underlined place part that needs correction in each of the following questions
1. The total number of students in my school is much greater than those of the teachers. A. total B. greater C. is D. those
2. She has disappeared three days ago, and they are still looking for her now. A. has disappeared B. and C. are still D. for her
3. Ozone has his origin in a number of sources, a prime one being the automobile engine. A. his B. prime C. being D. the
4. So far this term, the students learned how to express their ideas in writing a thesis A. this statement. B. learned C. their D. writing xunt A. Everybody
5. Everybody in my house had to do their share of household chores when we are at home. D. household chores
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Let's go through each question and analyze why the correct answer is chosen by eliminating the other options.
### Question 1:
**Sentence:** "The total number of students in my school is much greater than those of the teachers."
- **A. total:** This word is correct; it refers to the complete count or amount of students.
- **B. greater:** This word is correct; it is used to compare quantities.
- **C. is:** This verb correctly agrees with "The total number" (a singular subject).
- **D. those:** **Incorrect.** "Those" refers to plural nouns, but we are comparing "the number of students" with "the number of teachers." The correct word should be "that" (singular) to refer to "the number" in "the number of teachers."
**Correct answer:** D
### Question 2:
**Sentence:** "She has disappeared three days ago, and they are still looking for her now."
- **A. has disappeared:** **Incorrect.** The present perfect ("has disappeared") is wrong here because "three days ago" indicates a specific time in the past. The correct tense should be the simple past ("disappeared").
- **B. and:** This conjunction is correct, linking two actions.
- **C. are still:** This is correct, as it describes an ongoing action in the present.
- **D. for her:** This phrase is correct, indicating what they are searching for.
**Correct answer:** A
### Question 3:
**Sentence:** "Ozone has his origin in a number of sources, a prime one being the automobile engine."
- **A. his:** **Incorrect.** "His" is a pronoun used for people or animals, not inanimate objects like "ozone." The correct word should be "its."
- **B. prime:** This adjective is correct, meaning "primary" or "most important."
- **C. being:** This is correct, referring to the state of being an example.
- **D. the:** This article is correctly used before "automobile engine."
**Correct answer:** A
### Question 4:
**Sentence:** "So far this term, the students learned how to express their ideas in writing a thesis statement."
- **A. this:** This word is correct, referring to the current term.
- **B. learned:** **Incorrect.** "So far" indicates that the action started in the past and continues to the present, so the present perfect tense ("have learned") should be used.
- **C. their:** This possessive pronoun correctly refers to the students.
- **D. writing:** This gerund is correct as it refers to the process of creating a thesis statement.
**Correct answer:** B
### Question 5:
**Sentence:** "Everybody in my house had to do their share of household chores when we are at home."
- **A. Everybody:** This subject is correct, referring to all people in the house.
- **B. had to:** This phrase is correct, indicating a past obligation.
- **C. their:** **Incorrect.** "Everybody" is singular, so the correct possessive pronoun should be "his or her."
- **D. household chores:** This phrase is correct, referring to the duties at home.
**Correct answer:** C
These corrections address the grammatical issues by considering the correct verb tenses, pronoun usage, and agreement between subject and verb.
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