英语句型转换he [ was building his invention] at that time?[对括号内的提问
英语句型转换
he [ was building his invention] at that time?[对括号内的提问]
【 】 【 】 【 】 【 】 at that time?
turn it on and you can fly with it 改为复合句
you can fly it [ ] [ ] turn it on
3.this is the invention called Flying Donuts.改同义句
this is the invention [ ] [ ] Flying Donuts.