Hãy điền did, was or were vào chỗ trống: How many schools ... you go to? What ... your favorite subject?

Hãy điền ( did, was or were) vào chỗ trống :
1. How many schools............ ......... you go to?
2. What................. your favorite subject?
3. Where................ you live when you............. a child?
4. ......................they live in a house or a flat?
Hãy đổi câu sau sang hình thức nghi vấn :
1. you are interested in English.