小题1:It is our d________ (责任，义务) to try to cut back on production and reduce the amount of things we make and buy.
小题2:Trees a________ (吸收) the carbon dioxide in the air to produce oxygen.
小题3:People have harmed nature through a________ (农业), fishing, hunting and tourism.
小题4:Many countries have hesitated to give p________ (准许，许可) for the production of GM foods, as they would rather be cautious with this new technology.
小题5:I feel really g________ (内疚的) because I made some cruel remarks too.
小题1:duty
小题2:absorb
小题3:agriculture
小题4:permission
小题5:guilty
小题1:考查固定句型。It is one’s duty to do sth.“做某事是没人的责任”。故填duty。
小题2:考查单词拼写。absorb“吸收”。故填absorb。
小题3:考查单词拼写。agriculture“农业”，是名词。故填agriculture。
小题4:考查单词拼写。permit“允许”，是动词，名词是permission。故填permission。
小题5:考查系表结构。feel是系动词，后跟形容词作表语。guilty“内疚的”。故填guilty。