Ⅲ. 回答问题
阅读下面短文，并用英语回答问题(请注意每小题的词数要求)。
Last summer vacation, 19 - year - old Shirley visited a rehabilitation centre(康复中心). The children there couldn't hear or speak. After a day's visit, Shirley learnt a lot about the disabled children in the centre.
Among these children, Shirley noticed a boy, Tom. Though he couldn't hear and had difficulty speaking clearly, Tom spent much time practising pronunciation(发音). It touched Shirley very much. Just at that time, the young woman decided to be a volunteer and help the disabled children there. To “talk” with the children there better, Shirley studied sign language very hard. As the children needed lots of training, Shirley stayed with them and worked more than ten hours a day.
Another boy, Bob, had no one to play with and seemed very lonely. Shirley encouraged him to join other children in different activities. In the end, Bob changed a lot. He made several friends and looked much happier than before.
Shirley enjoyed her time in the rehabilitation centre. She wanted to bring happiness to every child. The children were upset when she left, but Shirley was much sadder. She would visit the children next summer vacation.
20. What did Shirley want to do after seeing Tom? (不超过 15 个词)

21. How many hours did Shirley work a day? (不超过 10 个词)

22. How did the disabled children feel when Shirley left? (不超过 5 个词)

20. She wanted to be a volunteer. /She wanted to be a volunteer and help the disabled children.
21. More than ten hours a day.
22. They felt sad/upset.