问题
填空题
根据中文提示，填写正确单词。
1. The (天空) is blue. The air is (干净的).
2. (有) a (树) near the river?
3. Is there (一条河)?
4. 一Is there (一片森林)? 一No, (没有).
答案
1. sky, clear 2. Is there, tree 3. a river 4. a forest, there isn't