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Unit 4 Life on MarsWelcome to the unit1 air tank 2 tent 3 dried food 4space helmet 5 special boots 6 computer 7 power pack 8 sleeping bagReading B11 e 2 f 3 h 4 b 5 g 6 d 7 a 8 cReading B21 f 2 c 3 d 4 b 5 e 6 aReading B31 a 2 b 3 b 4 c 5 c 6 a 7 b 8 cReading B4Spacecraft would travel at the speed of lightThere would not be enough water or oxygen.Food would most probably be in the form of pills and would not be tasty.The gravity is only about three-eights of that on the Earth.People might live in houses with huge comfortable rooms.People could have more time to relax.Students would study at online schools with “e-teachers”.Grammar A1 Neil Armstrong took his first flight at the age of 6.2.YuriGagarin became the first man to go into outer space when he was 27. 【请关注零五网：https://www.05wang.com/】3.People might move to another planet in the future because of the rapidincrease in population on the Earth．4.Without fresh food,meals will not be as tasty as they are today5.It would be funny to play football on Mars because the gravity is low.6.If you do not wear special boots,you can not walk on Mars．Grammar B1 of the distance from Mars to the Sun2 on the possibility of humans living on Mars in the future3 the problem of the low gravity on Mars4 of the transport on Mars5 about the number of people who would like to move to Mars6 the differences between life on Mars and that on the EarthGrammar C1 Mars is a planet with an environment similar to that of the Earth.2 Astronauts in space suits and helmets might stay on Mars for hours3 It is difficult to breathe on a planet that has much thinner air than that on the Earth.4 On Mars there might be people who carry air tanks on their backs.Grammar C2(1)bec  |