单项选择题
The word "chop down" in the second paragraph means （）
A．clear B．make rooms for C．destroy D．cut down
单项选择题 Though Pasteur was in poor health, he worked hard in order （）
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 Which of the following statements is NOT true（）
