Andrew Su, CEO at brokerage Compass Global Markets said the average cost of producing gold in Australia, home to some of the world's biggest gold miners, has jumped from $500 an ounce in 2007 to over $1,000 an ounce this year.
Persons (plural) is a very formal word. We only use it in rather legalistic contexts: [notice in a lift] Any person or persons found in possession of illegal substances will be prosecuted.
Whom as an Object Pronoun. Now you know that 'who' is a subject pronoun, let's look at 'whom.' 'Whom' is not a subject pronoun; instead, it is an object pronoun. Remember that an object pronoun is being used in the predicate of the sentence and not as the subject.any people misuse 'who', 'whom,' 'whose' and 'who's.' Watch this video lesson to not only learn the difference between these confusing words but also how to use each one correctly.