42.2 Write questions using the passive. Some are present and some are past. 1 Ask about glass. (how / make?) 2 Ask about television. (when / invent?) 3 Ask about mountains. (how / form?) 4 Ask about DNA. (when / discover?) 5 Ask about silver. (what / use for?)

Let's create passive voice questions. 1. How is glass made? 2. When was television invented? 3. How are mountains formed? 4. When was DNA discovered? 5. What is silver used for? **Explanation:** * **How is glass made?**: Пассивный залог, настоящее время (present passive). * **When was television invented?**: Пассивный залог, прошедшее время (past passive). * **How are mountains formed?**: Пассивный залог, настоящее время (present passive). * **When was DNA discovered?**: Пассивный залог, прошедшее время (past passive). * **What is silver used for?**: Пассивный залог, настоящее время (present passive).