Question

Выберите нужно местоимение I have looked for my pen but I can not find it

Answer 1

Личные-I
личное в объектном падеже-it
притяжательное-my

Answer 2

"I have looked for my pen but I can not find it."

The correct pronoun to use in this sentence is "I." The sentence is already correctly written, and "I" is the appropriate pronoun to use in this context as it refers to the speaker who is talking about their own actions and inability to find their pen.