I will be in beijing .l will visit the Great Wall 合为一句After three year's hard work he started his own b____第一题改成I will visit the Great Wall ______ ________ in Beijing
问题描述：
I will be in beijing .l will visit the Great Wall 合为一句
After three year's hard work he started his own b____
第一题改成I will visit the Great Wall ______ ________ in Beijing
答
when I'm
答
business
答
I will visit the Great Wall _while_ _being_ in Beijing
After three year's hard work he started his own business.