用适当的疑问词填空.-___did you play the piano when you were 10 years old?-Every day.为什么中国*不想让外国工程师建筑那条铁路？Why __the Chinese ＿＿＿ want foreign ＿＿＿ to build the ＿＿＿？
问题描述：
用适当的疑问词填空.-___did you play the piano when you were 10 years old?-Every day.
为什么中国*不想让外国工程师建筑那条铁路？
Why __the Chinese ＿＿＿ want foreign ＿＿＿ to build the ＿＿＿？
答