(单选题)
Hawking first noticed something was wrong with him when ______.
A.he was sent to hospital for test
B.his mother made him see a doctor
C.he was twenty
D.he visited his family at Christmas time one year
参考答案:C
参考解析:
细节理解题。根据第三段第一句“It was at the age of 20 that Hawking first noticed something was wrong with him”可知,霍金在20岁时第一次发现自己不对劲。故选C。
知识点:
