单项选择题

It can be inferred from the passage that ______.

A．Charles Williams had tried to prevent his son from the killing
B．Charles Andrew kept his scheme to shoot as a top secret
C．people who had the clue of the killing did not take Andrew's words seriously except two
D．some of Andrew's classmates found a revolver in his backpack
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单项选择题
Which of the following statements can be inferred from the passage
A．Forests could not function without the fig wasp.
B．Forest will recover no matter what we do to them.
C．If man does not acquire an understanding of his relationship to the forest and other habitats there will be an ecological disaster.
D．Scientists' long-term contribution to the quality of life depends on their fig wasp researc
单项选择题
The author would like to see ______.
A．more buildings erected in the forests
B．fig trees planted in all forests
C．scientific efforts diverted to bomb making
D．the preservation of as many diverse species as possible
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