who puts so many large stones on the road改为强调句,强调who
问题描述：
who puts so many large stones on the road改为强调句,强调who
i didn't finish my homework until 9 o'clock.改为强调句,强调didn't
答
Who is it that puts so many large stones on the road?
i didn't finish my homework until 9 o'clock at all.