单项选择题

A．Some pessimistic experts.
B．Environmentalists.
C．Some optimistic experts.
D．All of the above.
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单项选择题
A．$35.B．$50.C．$100.D．$250.
A．$35.
B．$50.
C．$100.
D．$250.
问答题
For this part, you are allowed 30 minutes to write a message for one of your parents on the occasion of his her birthday using no more than 120 words. Base your writing on the following outline: 1. 向父亲或母亲祝贺节日； 2. 从一件难忘的事情记述父亲或或母亲的无私奉献； 3. 如何回报父亲或母亲。
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