题文

完形填空。

What is a clone? A clone is a copy-a genetic (基因的) copy. Genes (基因) are the in-structions for life. They    1    a cell what to do and how to do it. Genes make    2    plant or animal different and unique. A clone has the same genes    3    the original organism (生物体).       Cloning is not new.    4    have been cloned for centuries. Many new plants are grown from cuttings (插枝) from the original plants. One benefit of cloning is that we can make many copies of the best and healthiest plants.        It's     5    more difficult to clone animals than plants. In 1997 scientists succeeded in    6    a sheep. The creation of Dolly, the Cloned sheep, caused great attention around the world in no time. Scientists had tried to clone other animals like frogs before that, but they failed Frogs died as tadpoles (蝌蚪), never living    7    to become adult frogs.       It may soon be    8    to clone many types of animals. Will we also    9    clone human organs (器官), or even a whole human being? Maybe now the question is not whether we can clone humans, but   10    should we clone humans?

(     )1．A．keep        (     )2．A．each        (     )3．A．for         (     )4．A．Plants     (     )5．A．many        (     )6．A．clones      (     )7．A．long enough (     )8．A．helpful     (     )9．A．must        (     )10．A．except

B．make             B．neither        B．from           B．Animals       B．much             B．cloning        B．short enough  B．difficult       B．should         B．except for

C．tell                C．both          C．with            C．Life          C．few                C．cloned        C．enough long   C．possible         C．can             C．instead

D．let                    D．none            D．as                   D．Humans          D．little                  D．to clone           D．enough short       D．new                 D．be able to           D．instead of

题型：完形填空  难度：中档

答案

1-5: CADAB     6-10: BACDC

据专家权威分析，试题“完形填空。 What is a clone? A clone is a copy-a genetic (基..”主要考查你对  科教类阅读  等考点的理解。关于这些考点的“档案”如下：

科教类阅读

考点名称：科教类阅读

• 科普类的阅读：
  科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时，要以事实为中心进行思考，抓住事物的特征、用途、相互关系等。
  如果是介绍社会现象的文章，要掌握所谈现象的内涵。

• 答题技巧：
  1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和
     关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。
  2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。
  3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。