4. Present perfect vs. past simple. Climate change vocabularyVersión en línea 4. Grammar por MARIA DEL PRAD SOBRINO DE TORO 1 Scientists__________climate change for more than a century. a studied b have studied 2 Scientists__________to record global temperatures about 140 years ago. a began b have begun 3 The average global temperature on Earth________by about 1º Celsius since 1880. a increased b has increased 4 In August 2018, Swedish teenager Greta Thunberg_______________ a global wovement to fight climate change. a started b has started 5 Since 2018, many students___________________ Thunberg´s movement. a joined b have joined 6 In 2015, 195 countries____________ the Paris Climate Agreement. a signed b have signed
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