像小胖那样算：

5×80=____     7×90=____

完成句子
（1）I saw the sharks. (改为一般疑问句)
____  see the sharks?
（2）Were there any famous singers at the aquarium?(否定回答)
No, ____ .
（3）He did his homework last night.(改为否定句)
He ____  his homework last night.
（4）The students watched a movie about dolphins at the aquarium. (对划线部分提问)
____  the students watch a movie about dolphins?
（5）No one came to the sale because the weather was bad. (对划线部分提问)
____  no one come to the sale?

以种子繁殖后代的植物叫做       ____   ，包括    ____    植物和    ____    植物。裸子植物种子裸露，无  ____    包被，而被子植物的种子外有    ____  包被。常见的裸子植物有：  ____    、____      、     ____  、杉树。