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.