为什么是Travel in space 而不是Travel in the space

为什么是Travel in space 而不是Travel in the space Travel in space啥意思? space travel I wish ican travel in space one day 改错 We are not going to travel in space.(改为同义句)______ ______ ______ in space. 首字母填空（难）Space s_____ can both travel and work in space now . I might become the first chinese women to travel in space中to travel等于什么 travel into space space travel是什么意思 about space travel是什么意思 space travel可数吗? 为什么是live on space station而不是live in space station.live on靠~生活 代进去不通 We are not going to travel in space.改为同义句.—— —— ——in space. Liu Yang is the first Chinese woman astronaut to travel in space为什么不能用 who was travel 或 travelled You travel to space in_______. As the first Chinese to travel in the space ,Yang Liwei is e____about astronomy would you like to travel in space 英语作文8行字 243.It would be ____to travel in space.A.impossible B.fun C.impatient D.convenient