Unit 4
Reading1
Life on Mars
1. To learn something about life on Mars2. To learn the words and phrases in this passage
Words and
Expressions
Marshelmetair tankdried foodpower packsleeping baggravity
n. 火星n. 头盔n. 氧气罐n. 干粮n. 电源包n. 睡袋n. 重力