When I got to school, I realized I ______ my backpack at home.

用石灰水、铜片、盐酸、碳酸钠、石灰石五种物质进行下列实验，其中无法完成的是（    ）

有“植物世界的熊猫”和“鸽子树”之称的中国特有珍稀植物分别是____ 和____ 。

短文填空。（用方框中的词的正确形式填空，将短文补充完整(注意大小写)。

Dear Dr Know,
I’m not ____ , I have too many rules in my house, I have to get ____  at six o’clock every morning. I can’t meet my ____ after school because I have to do____ homework. I can’t watch TV on school nights. And I have to be in bed by ten o’clock.____ weekends, I have to ____  my room and wash my clothes. Then I ____ to help my mom make ____ . Later I have to go to____  Children’s Palace to learn piano. I never have any fun. What____  I do ?
Zhao Pei