根据上下文和提示完成句子。
1. What are you doing for vacation?
_______________________________________ (sightsee).
2. What are the twins doing for vacation?
______________________________________ (go hiking in the mountain).
3. ______________________________________?
He's fishing.
4. ______________________________________?
She's bike riding.
5.What are you and your family doing on Sunday?
_____________________________________ (have a picnic in the park).
1. I'm going sightseeing
2. They are going hiking in the mountain
3. What is he doing
4. What is she doing
5. They are having a picnic in the park
(答案不唯一)