Looking ahead facing the 21st century 2．It seems that...句型　似乎……,好像…… Given this data,______________________(好像)the link between human activities and rising global temperatures is not merely a coincidence.

　　it seems that

　　3．条件状语从句的省略 ______________________(如果有必要的话),give reasons for your answers.

　　If necessary 4．not only...but(also)．..不但……而且…… Rivers,lakes,and wet-lands are sources of fresh water,______________(不但)for humans,_____________(而且)for wildlife as well.

　　not only but 单元语法 被动语态(Ⅲ)和转述结构 1．Tony was unhappy for__________to the party. A．having not been invited B．not having invited C．having not invited D．not having been invited

　　解析：选D.for 是介词,后接动名词作宾语;Tony 与invite 之间是被动关系,要用被动形式;且invite 应在 be unhappy 之前,所以要用完成形式;not 要放在非谓语动词形式的前面.

　　2．Customers are asked to make sure that they________the right change before leaving the shop. A．will give B．have been given C．have given D．will be given

　　解析：选B.句意：顾客在离开商店前,都被要求确认找给他们的零钱正确.they 和动词 give 之间显然是被动关系,所以用被动语态.

　　3．She said to me,“Is there any water there？” →She__________me__________there was any water__________. 解析：一般疑问句变转述结构要用 if 引导,地点副词也做相应调整,there 变为 here. 答案：asked;if;here

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