| 5000 Vocabulary List for Visiting Scholars in the USA - Page 378 | |||
| Word | Type | Used in a Sentence | Synonym | 
| on | prep. | He threw the books on the floor. | motion towards | 
| prep. | You must come on the hour. | exact point of | |
| prep. | He lived on bread and water. | a source of | |
| prep. | We must travel on business. | the purpose of | |
| prep. | It was a book on physics. | about | |
| adj. | The television is on. | in operation | |
| adj. | We have nothing on for the weekend. | planned | |
| adj. | The parade is on. | taking place now | |
| once | adv. | We were in Beijing once. | one time | 
| conj. | Once he goes, we can clean up. | as soon as | |
| one | noun | There was only one. | a single item | 
| pron. | One must not take themselves seriously. | unstated person | |