必修3unit4warming-upandreading.pptVIP

1.Who are the small clever animals with hands and feet? 2. Are they taking good care of the earth? Why? 2.Because they are putting too much carbon dioxide into the atmosphere. The earth may become too hot to live on . 1.Human beings 1.What should we do to prevent the global warming? The main method is to prevent people from putting too much carbon dioxide into the atmosphere. 2. Now please give some good and practical ideas. Use solar energy Save electricity Bike, bus and walk Plant trees Recycle …… Taking care of the environment is taking care of ourselves! summary After the “big bang”, the earth was still just a cloud of _______,it _______loudly with fire and rock, which were _____ to produce the_________, water vapour and other gases. Then ________ began to appear on the earth. dust exploded in time carbon water ____________ in water are considered to be the earliest lives on the earth. The O2they supplied encouraged the lives of______________. Slowly green plants grew on land, which were followed by __________like insects ________. When the plants grew into______, ______ appeared. Then _______ developed but disappeared later, which made the rise of a totally different animal,______, possible, and finally _____ spread all over the world. shell- -fish and fish amphibians forests reptiles dinosaurs mammal humans The small plants land animals 1. The earth became so violent that it was not clear whether the shape would last or not. 1) violent 猛烈的, 激烈的 2) whether 可以引导主语从句、表语从句、 宾语从句和同位语从句; 而if只能引导宾语从句。 引导宾语从句既可以用whether, 也可以用if。 Could you tell us whether / if it snows in winter in Australia? 2. They were in time to produce … in time 及时; 终于 She will be back in time to prepare dinner. The doctor came in time to save her life . 医生及时赶来救了她的命。 Mary usually gets home in time to bath the children. 玛莉通常及时到家给孩子们洗澡。 与time相关的短语: in no time 立刻, 马上 at times 有时 at a t