问题补充:
, he went to Australia to study English.
A. When a boy of 12
B. He was 12 years old
C. When he was the age of 12
D. When was 12
答案:
(答案→)A. When a boy of 12
B. He was 12 years old
C. When he was the age of 12
D. When was 12
解析:考查省略。当主句和从句的主语一致,而从句又是主语+be动词的形式,这时从句的主语和be动词可以省略。故When a boy of 12 = When he was a boy of 12,故选A。