6. From the text we can guess the writer’s team is___________.

5. Which of the following is the writer’s attitude(态度)?

4.In the passage the writer tries to tell us that __________.

3.According to the writer, _____________.

2. We can infer (推断) from the story that___________.

1.From the story we know that___________________.

4.C。专家建议学生书包重量应在他本人体重的10% 和15%之间。所以一个体重为40千克的学生所背书包的重量应是6千克。

3.A。根据该词组所在句子及上下文意思，“许多学生使用带有轮子，可在地上滚动的书包”可以推测选项A的解释合乎文意。

2.A。短文前两句是本题答案之所在。