Wrong. Biography is history’s most interesting part.

Right. Biography is the most interesting part of history.

Revise. His striking appearance held the class’s attention.

308. Use the objective case of a pronoun which is the object of a verb or of a preposition.

Wrong. My father decided that the farm was the best place for my brother and I.

Right. My father decided that the farm was the best place for my brother and me.

Revise. Most of we girls are studying household art.

309. Use the objective case of a pronoun which is the subject of an infinitive after a verb of saying, thinking, permitting, etc.

Wrong. Our parents let my sister and I drive the horse.

Right. Our parents let my sister and me drive the horse.