【正文】
because . is no gas in the plane plane must be driven by a man is smaller than a rocket is no air above 240 kilometres away from the earth ( C ) hot gas in the rocket is used for . the men in the rocket warm food the rocket fly up the balance of temperature ( C ) does this passage mainly talk about? gas in the rocket. plane can’t fly to the moon. can know about the moon and the rockets. way from the earth to the moon. 。它圍繞著太陽(yáng)轉(zhuǎn)動(dòng)。Unit 2 We have not found life on any other plas yet. Ⅰ .根據(jù)首字母及漢語(yǔ)提示補(bǔ)全單詞 came upon a group ( 群 ) of children playing in the street yesterday. 2. None ( 沒(méi)有人 ) of us has been to we all want to visit there. can use solar ( 太陽(yáng)的 ) energy to do many things today. found it impossible ( 不可能的 ) to make Ann change her mind. learn