用所给单词的适当形式填空。
call，alone，laugh，documentary，end
1. My father likes watching ________ in his spare time.
2. I like the song ________ You and Me very much.
3. The story has a sad ________.
4. I think ________ is a kind of good way to relax.
5. Li Dong's parents went to England yesterday. Now he is at home ________.
1. documentaries 2. called
3. ending 4. laughing 5. alone