1. His parents are very kind and hospitable people. (Who...?)
Who is very kind and hospitable?
2. Last week they visited many interesting places(When...?)
When did they visit many interesting places?
3. We''ll ask them those ten questions tomorrow.( How many...?)
How many questions will we ask them tomorrow?
4. Last year her father had an opportunity to travel to Africa. (Where...?)
Where did her father travel last year? или
Where did her father have an opportunity to travel last year?
5. They haven't been homesick in this friendly host family.(Why....?)
Why haven't they been homesick?