be doing 现在进行时肯定句 — 英语词汇题
题目
用括号内动词的适当形式补全句子，每空一词。周末到了，公园里的人们都在做自己的事情：
1. Look! Lingling ___ ___ a kite. (fly)
2. Sam ___ ___ football with his friends. (play)
3. My sister ___ ___ a picture in the park. (draw)
4. Tom and Amy ___ ___ to music under the tree. (listen)