根据情境， 写出一个语法上及语义上都正确的单词。
1. —He became____ ___after the traffic accident.
—Poor boy! He has to spend the rest of his life in a wheelchair(轮椅).
2. —Where’s my sweater?
—I saw it _______behind the door just now.
3. —I hear you are going to study _______. Which county are you going to?
—England. It’s the best place to learn English, I think.
4. —Is the library open every day?
—No, on _______only. It is closed on Saturday and Sunday.
5. —How was yesterday’s charity show?
—It was a big _______. We collected over 100, 000 yuan.
