英语句子.改写.
问题描述：
英语句子.改写.
1、The meeting has been on for two hours（对话线部分提问）
__ __ ___the meeting __ on?
2、MY sister plays the piano once a day （对话线部分提问）
__ __ ___your sister play the piano?
3、He has been to Japan twice.（改为一般疑问句）
__ ___ been to Japan twice?
I have learn French since last week .（改为一般疑问句）
_____ you learn French since last week?
答
1.How long has the meeting kept on?
2.How often does your sister play the piano?
3.Has he been to Japan twice?
4.Have you learn French since last week?