If he started at 9 o'clock, he ________ be there by now.


  1. A.
    need
  2. B.
    shall
  3. C.
    ought to
  4. D.
    must

It's very nice _______ you to do that.


  1. A.
    to
  2. B.
    for
  3. C.
    of
  4. D.
    with

The old lady went to the supermarket, ________ some eggs and walked home．


  1. A.
    buy
  2. B.
    bought
  3. C.
    buying
  4. D.
    to buy

His success ________ a singer made his family ________. He is famouse all over the country.


  1. A.
    as, exciting
  2. B.
    as, excited
  3. C.
    like, excite
  4. D.
    like, excited

Although there are many ________ programs on TV, I think people should not spend so much of their time in front of their TV sets.


  1. A.
    worthwhile
  2. B.
    interesting
  3. C.
    good
  4. D.
    worth

This workcalls for great ________．I doubt whether you’ll be fit for it．


  1. A.
    advice
  2. B.
    patience
  3. C.
    skill
  4. D.
    knowledge

动物行为中的印随学习，在进化上的选择价值是


  1. A.
    逐步增强个体对环境的适应性
  2. B.
    逐步减少环境对个体生存的威胁
  3. C.
    减少幼体对环境的依赖
  4. D.
    增加幼体的生存机会

下列关于高等动物的三大物质代谢的叙述不正确的是


  1. A.
    呼吸作用为三大物质的相互转化提供了原料
  2. B.
    细胞中必需氨基酸主要来自食物
  3. C.
    葡萄糖转变成氨基酸与氨基转换作用有关
  4. D.
    1 g脂肪氧化分解释放的能量是1 g糖元的2倍多，所以脂肪是主要的能源物质

食物中的蛋白质主要是为生物体的生长和组织的更新提供原料。你认为下列哪个生化反应过程能够提高食物中蛋白质的利用率


  1. A.
    脱氨基作用
  2. B.
    转氨基作用
  3. C.
    氧化分解作用
  4. D.
    同化作用

母系遗传的表现是


  1. A.
    后代一般不出现一定比例的分离
  2. B.
    后代无性状分离
  3. C.
    正、反交结果相同
  4. D.
    后代有一定的分离比
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