根据中文提示完成句子。
1. ---去年国庆节你去了哪里?
---我去了海南。我在海边看到了许多漂亮的贝壳。
--- _______ did you go last National Day?
---I _______ to Hainan. I _______ many beautiful shells by the sea.
2.在今天下午,天空中有些乌云。
This afternoon, there _______ some black clouds in the ______.
3.今天早上,我和迈克在公园里放风筝。
This morning, Mike and I _______ _______ in the park.
4. 30年前,我们只能通过写信和打电话和朋友们联系。
Thirty years _______ , we _______ letters and _______ the telephone to call our friends.