1. --- What are you doing for vacation?

--- I'm spending time with my friends.

2. --- When are you going?

--- I'm going next week.

3. --- How long are you staying?

--- We're staying for two weeks.

4. sightseeing, fishing, relaxing, visiting, going camping, spending

5. how long, get back, at home, take a vacation, think about, decide on, go bike riding