1．开头常用句式
①Now it is commonly held that ... But I doubt whether ...
现在大家都普遍认为……，但我怀疑是否……
②These days we are often told that ... But is this really the case ... ?
最近我们经常听说……，但事实上果真如此吗？
③Currently there is a widespread concern that ...
目前，……引起了人们的普遍关注。
④Now people in growing numbers are coming to realise that ...
现在越来越多的人开始意识到……
