1、单元练习题（二）翻译词组1进行一项调查 _2. 学生的百分比 _3. 离开地球 _4. 住在火星上的好处和不足 _5. 一些危险的外星人 _6. 错过了第一部分 _7. 打开电视 _8. 以讨论开始 _ 9. 以那点开始 _10. 不同于那个情况 _训练题I Fll in the blanks without referring to the bookLiving on Mars has b_ advantages and disadvantages. It is i_ to live on Mars. Children could go to o_ schools. There is muc
2、h m_ space. R_ would do all the work. And travelling in space is fun. However, there are also disadvantages of it. People arent sure if it is really s_. It is so far a_ from the earth. There maybe some d_ aliens. There is no food, water or o_. People could get ill f_ living there. II Find some useful phrases:1 一项在校园中开展的调查 _2 百分之五十的学生 _3 居住在另一个星球上 _4 上网校 _5 对生活在那儿感到担心 _6 伤害他们 ( 2 种) _
