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1.Whatitwastobecomewasuncertainuntilbetween4.5and3.8billionyearsago2.Theywereintimetoproducecarbon…whichweretomakeimportantisintime:及时;最终intime(forsth./todosth.):及时;不迟我迟早会遇见他.I’llseehim________.她会及时回来准备晚餐.Shewillbeback__________preparedinner.你认为我们能及时赶上火车吗?与time相关的短语:innotimeattimes:fromtimetotimeatatimeatonetimeonceuponatime4.allowedtheearthtodissolveharmfulgases…5.Theymultipliedandfilledtheoceansandseaswithoxygenwhichencouragedthe6.Thelaideggstooandexistedontheearth…existin存在与…之中existon靠…为生existby靠…生存Itwasimpossibleforthemto________suchasmallincome.Theuniverse________space..8.Manymillionsofyearslaterthefirstgreenplantsbegantoappearonland.动词Ahen____inthecornerquietly.Afterawhilethehen____anegg.Buttheman____tohiswifethattheeggwasboughtintheshop______inthecentreofthetown.10.Theyareputtingtoomuchcarbondioxideintotheatmospherewhichpreventsheatfromescapingfromtheearthintospace..protect…from/againststh.2.escapen.vi.vtItisone’sturntodo…..Takeone’sturntodo….Taketurnstodo….byturnsinturnInone’sturn