| 1 | Previewing can help us better master new knowledge. | |
| 2 | They spend a certain amount of time previewing new skills every day. | |
| 3 | I usually preview the course my teacher will teach one week in advance. | |
| 4 | We need to preview the content of this book in order to understand it better. | |
| 5 | We will preview the paper before class so that we can discuss it better. |
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