In the multiple-choice questions:
1. B. whose
Explanation: "Cin which" should be replaced with "B. whose" to correctly refer to the possessive form.
2. D. who
Explanation: "Iam" should be corrected to "I am" and "since" should be replaced with "since it is" for grammatical clarity. Additionally, "each student should surpass" should be replaced with "each student must overcome."
3. C. who whose
Explanation: "Onine" should be corrected to "Online." The correct choice is "C. who whose" to correctly indicate possession and relation between "families" and "teachers."
4. A. whose
Explanation: The sentence should be rephrased as "Do parents use the school system as a daycare, which is why children do not appreciate studying?" to maintain coherence and grammatical correctness.
5. A. which
Explanation: "attended" should be replaced with "attend" for grammatical correctness. The correct choice is "A. which" to introduce the relative clause.
6. C. who
Explanation: "indudes" should be corrected to "includes." The correct choice is "C. who" to correctly refer to the labor classification, which involves personnel duties.
7. D. which
Explanation: "got involved" should be replaced with "got involved in it" for clarity. The correct choice is "D. which" to introduce the relative clause modifying "classrooms."
8. A. by whose
Explanation: "by which" should be replaced with "by whose" to indicate possession correctly.
9. C. whose-that
Explanation: "children" should be corrected to "children who" for grammatical clarity. The correct choice is "C. whose-that" to maintain coherence and indicate possession and relationship correctly.
III
1. "which" should be replaced with "that" to form a restrictive relative clause, specifying the materials being referred to.
2. The sentence seems correct grammatically.
3. "is effective" should be replaced with "Is effective" to form a grammatically correct question. Additionally, "that" should be replaced with "that can assist" for clarity.
4. "merruse" should be corrected to "must use" for clarity.
5. "Graduate" should be corrected to "Graduates" to agree in number with the plural subject. Additionally, "offered by A D other institutions" should be replaced with "offered by other institutions" to remove redundancy.
6. "grographical" should be corrected to "geographical" for spelling accuracy.
7. "profession uses English" should be replaced with "professions use English" to maintain subject-verb agreement.