40. Most children must learn for the importance of good manners.
Answer: D
Most children must learn for the importance of good manners themselves.
The correct form is "themselves," as it reflects the reflexive pronoun used to refer back to the subject "children." This indicates that the children are the ones who need to learn the importance of good manners personally.
A) Them
"Them" is a pronoun used to refer to a group of people but does not indicate reflexivity. In this context, it fails to express that the children are learning for their own benefit, making it an incorrect choice.
B) Themself
"Themself" is a nonstandard singular reflexive form. While some may use it in informal contexts, it is not grammatically accepted in standard English for plural subjects like "children," so it is incorrect in this instance.
C) Itself
"Itself" is a reflexive pronoun used for singular, non-human subjects. Since the subject here is "children," which is plural, "itself" does not apply and is therefore incorrect.
D) Themselves
"Themselves" is the correct reflexive pronoun used for plural subjects. It accurately indicates that the children are the ones who must learn the importance of good manners for their own benefit.
Conclusion
"Themselves" is the only option that correctly matches the plural subject "children" with the appropriate reflexive pronoun, emphasizing that the learning is a personal responsibility. All other options fail to convey this relationship, making them unsuitable in this context.