原句: Although the development of science and technology has brought the process to mankind, our surrounding natural environment is greatly destroyed. 改句: The development of science and technology has brought the process to mankind whileour surrounding natural environment is greatly destroyed. 【解析】 原句是一句典型的轉(zhuǎn)折句,在四六級作文中,"although"和"though“的應(yīng)用相當廣泛,那么如何使自己與眾不同呢,在此,我為大家推薦一個連詞”while“,這個單詞有很多意思,但在改句中,它的意思是”雖然、盡管“,在考場上用的人相對比較少,所以以后在作文中,如果出現(xiàn)了轉(zhuǎn)折、對比之類的關(guān)系句,記住要想到”while“哦! 下面大家來試試吧! Existing employees have made concessions, such as higher retirement ages, but it is near impossible to reduce the payments made to existing pensioners. 答案: While existing employees have made concessions, such as higher retirement ages, it is near impossible to reduce the payments made to existing pensioners.