中国石油大学 / 中石油
正确率：100%
38. What is the main purpose of the event?
A、To increase people’s sense of environment protection.
B、To invite people to join an environmental organization.
C、To persuade families to have an outing in the mountains.
A、To increase people’s sense of environment protection.
B、To invite people to join an environmental organization.
C、To persuade families to have an outing in the mountains.
参考答案：
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