C．their world was completely changed

　　D．the doctors had given a wrong diagnosis

　　解析：C　细节理解题。由第三段中的their lives were "turned upside down"可知，当得知Gavin患有先天性利伯氏黑蒙(家庭遗传性视神经萎缩)时，Gavin的父母感到他们的生活彻底变了。

　　2. How did Gavin feel about his progress?

　　A．Pleased. B．Uneasy.

　　C．Grateful. D．Doubtful.

　　解析：A　推理判断题。由倒数第三段中的He gets very happy when he does things independently for the first time和It's such a joy to him可知，当Gavin能够第一次独立做事情时，他非常高兴。

　　3. Why did Jennifer Stevens record Gavin's achievement?

　　A．To provide videos for a website.

　　B．To give hope to other LCA patients.

　　C．To raise money for Gavin's treatment.

　　D．To call on people to help LCA children.

　　解析：B　细节理解题。由倒数第二段中的Each video provides a little hope可知，Jennifer Stevens记录下Gavin的小进步是为了给自己的家人和全国患有LCA孩子的家庭带来希望。

　　4. We learn from the last paragraph that ________.

　　A．Gavin is planning on learning music

　　B．Gavin will receive gene replacement treatment soon

　　C．Gavin has received great help from people nationwide

　　D．Gavin and his parents are making efforts to fight the disease

　　解析：D　推理判断题。由最后一段的描述可知，Gavin和父母正在积极努力对抗疾病。

Ⅲ.完形填空

　　 When Glenn Cunningham was 8, he was horribly burned in a schoolhouse fire. He was __1__ to a nearby hospital.

From his __2__ the semi­conscious little boy heard the doctor tell his mother