题目内容
Tina’s sister began to ride a bike to school ___________.
A. when 6 years old B.at the age of 6 C. at the age of 6 years D. at 6 years old
B
练习册系列答案
相关题目
题目内容
Tina’s sister began to ride a bike to school ___________.
A. when 6 years old B.at the age of 6 C. at the age of 6 years D. at 6 years old
B