Tom, be careful with the knife! You can cut _____ .
yours
it
you
yourself
When the subject or the object in a sentence refer to the same person or thing we use a reflexive pronoun. Reflexive pronouns (myself, himself, ourselves etc) end in -self (singular form) or -selves (plural form). They refer back to the subject forms of personal pronouns: Steven was in such a hurry this morning that he cut himself shaving.For the test sentence ‘Tom, be careful with the knife! You can cut _____ .’ we need to choose the reflexive pronoun that refers to the subject form of the personal pronoun ‘you’: you → yourself (singular) or yourselves (plural). As we are given the context ‘Tom, be careful with the knife! You…’, we understand that the speaker cautions one person – Tom, therefore, we need the singular form of the reflexive pronoun ‘yourself’. Thus, we need ANSWER 4 (‘yourself’).