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Surfingfirststarted(ontheIslandofHawaii)(就括号部分提问)Atunnelisveryhardtobuild.(改为用easy询问的一般疑问句)Hesawthebagwhenhisbikehitit(用not...until...改写句子)

题目详情
Surfing first started (on the Island of Hawaii)(就括号部分提问)
A tunnel is very hard to build.(改为用easy询问的一般疑问句)
He saw the bag when his bike hit it(用not...until...改写句子)
▼优质解答
答案和解析
Where did surfing first start
Is a tunnel very easy to build
He didn't see the bag until his bike hit it