помогите задать вопрос к этим предложениям, используя следующие слова What? Why?

Помогите задать вопрос к этим предложениям, используя последующие слова What? Why? What time? Who? When? How? Where?

Пример: 1. Where did you stay? I stayed at the Holiday Inn.
2. I visited Hans Klinger.
3. I arrived on Wednesday.
4. I traveled by car.
5. I hired a car because the factory is 30 km outside the city center.
6. We discussed a new contract.
7. I arrived back yesterday.
8. I started work this morning at 9.00.
9. I telephoned Hans Klinger at 9.15.
10. He signed the contract yesterday.