—I hear your brother will enter Tsinghua University this summer.
—Exactly，he was a born genius.He was able to read and write ________ the age of 4.（ ）
A．inB．onC．atD．of
—I hear your brother will enter Tsinghua University this summer.
—Exactly，he was a born genius.He was able to read and write ________ the age of 4.（ ）
A．inB．onC．atD．of
试题篮
()
粤公网安备 44130202000953号
