I would like to check if this sentence is grammatically acceptable.<br/><br/><i>Please check your work before handing in.</i><br/><br/>Does the word, "handing" , being a transitive verb, needs the noun/pronoun, "it"? <br/><br/>Is it acceptable to omit the word, "it", as the noun is already mentioned in the the first clause?<br/><br/>Thanks!