题目内容
6．Once，an old and strange scientist Decided to use the cloning procedure to make（61）aclone of his boss's dog．He was working on the assumption that if he produced a clone of the dog，his boss（62）would approve（approve） his promotion．The man stirred his mixture（63）which/thatcontained the dog's hair．If his colleagues heard about his efforts they would be bound（64）to stop（stop） him．They could never resist an opportunity of saying that he was too old to work in a cloning laboratory．He did make mistakes（65）fromtime to time，but only last week he succeeded in restoring a（66）dead（die） mouse to life as a clone．So，why not clone a dog？As he was thinking，the mixture thickened．He stared impatiently at it，（67）waiting（wait） for the shape of the animal that would（68）shortly（short） emerge．Gradually the cells began to form．A creature began to grow and develop（68）claws（claw） and feathers!The scientist screamed and fled from the room as any possibility of promotion（70）disappeared（disappear） in that instant．He had not brought back a dog but produced a monster!分析 本文向我们讲述了曾经，一位又老又古怪的科学家决定用克隆程序克隆他的老板的狗，他在设想，如果他克隆出一只狗，老板就会批准他的晋升．最后科学家没能克隆出狗却制造了一个怪物．
解答 61．a，考查冠词，clone是可数名词，表示泛指，前使用不定冠词a．
62．would approve，考查时态，if引导的条件状语从句，主句使用一般将来时，从句使用一般现在时，该题从句是一般过去时，主句应使用过去将来时would do 的形式．
63．which/that，考查定语从句，句子先行词是mixture，引导定语从句使用which/that．
64．to stop，考查不定式，be bound to do sth．"一定会做某事"．
65．from，考查介词，from time to time"时不时地"．
66．dead，考查形容词，此处应使用形容词修饰后面的名词mouse．
67．waiting，考查非谓语动词，wait 的逻辑主语是he，构成主动的关系，因此使用现在分词充当非谓语．
68．shortly，考查副词，此处应使用副词修饰谓语动词would emerge．
69．claws，考查名词，此处应使用名词的复数形式claws．
70．disappeared，考查时态，短文描述的是过去的事件，因此使用一般过去时disappeared．
点评 对于语法填空这类题，一是懂得分析句子结构，二是知道充当各个句子成分的词类或词性，从语法上确定答案，当然，对于某些固定搭配也要牢记，在平时的学习中要多积累这些词汇或短语，对于句子使用的时态语态也要通过语境进行确定．
