unit 3 amazing people 时间：30分钟 ⅰ.单项填空 1．people have always been curious ________ how living things on the earth exactly began. a．in b．at c．of d．about 答案 d [本题考查词语搭配。be curious about表示“对……好奇”，是固定搭配，因此d为正确答案。] 2．ming and qing tombs have ________ relatively undamaged.they，________，have suffered some damage from centuries of exposure，war，fire and deliberate destruction. a．been remained；however b．survived；though c．existed；therefore d．left；thus 答案 b [第一空用survived，表示“经历……后残存下来”；第二空用though，表示转折。] 3．at minus 130 ℃，a living cell can be ________ for a thousand years. a．spared b．protected c．preserved d．developed 答案 c [spare抽出(时间)；省去，免去；protect保护；preserve保护；保存；develop发展；研制，开发。根据题意选c。句意为“在零下130℃，一个活细胞可以保存1 000年的时间”。] 4．you will be successful in the interview ________ you have confidence. a．before b．once c．until
