单项选择题
In the opinion of the author, （） are being destroyed terribly at present.
A．the oceans B．the atmosphere C．the rain forests D．all the above
单项选择题 This passage is mainly about （）
单项选择题 The fact that people in many countries sent money to help build the Pasteur Institute shows that （）
单项选择题 Though Pasteur was in poor health, he worked hard in order （）
