Which of the following is the main idea of the whole passage？
A. There are three ways in which trees are important to human beings.
B. Providing man with shelter is the most important role the trees play.
C. Supplying man the wood and warship is the most important way the trees have.
D. Assisting in stopping drought and floods is the most important role the trees play.
查看答案
The author implies that which of the following is the type of scientific explanation most
A. Experimentation.
B. Reduction.
C. Interaction.
D. Generalization
John's father couldn't drive himself.
A. Right.
B. Wrong.
C. Doesn't Say.
What actions can be taken to prevent people from cutting down trees？
A. To persuade the villagers to understand the importance of trees.
B. To provide the villagers with more money and food.
C. To set up a strict system of control and educate the people.
D. To ask the villagers not to be lazy or careless.
The tone of the author in this passage is most probably______.
A. concerned
B. objective
C. optimistic
D. indifferent
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