根据句意及汉语提示完成句子。（共5分）
Our schoolbags are _______(重的).      ____________
I like the green _______(毛衣).       ____________
There are _______(五十) students in the room.    ____________
_______(欢迎) to our school.        ____________
There are five _______(电脑) in the room.     ____________