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rth and life on Mars. (on page 11 C2 on Students’ book) Earth today Mars in 2100 It’s polluted and crowded Spacecraft are slow Gravity is not a problem for us People can wear many types of shoes People do not have much space we take exams at school we have many kinds of food with different tastes. It’s clean and has lots of space Space shuttles are very fast, travel at half the speed of light. People wear special boots. People live in domes with ten bedrooms. We take exams at online schools. Meals are just pills. Only about threeeighth of the gravity on Earth Task 5 : Discuss in groups. Write down your own ideas as many as possible. Advantages (優(yōu)點 ) of life on Mars . Disadvantages (缺點 )of life on Mars. Homework A. Finish B1 , B2 , C1 on Students’ book . (page 10page11) B. Finish the exercises Ⅰ, Ⅲ, Ⅳon the Handbook of Evaluation (page3page4) C. Finish Task 5 in groups. Thank you !