The word "they" underlined in Paragraph 1 refers to______.
A. organisms
B. fish
C. toxins
D. flesh
查看答案
听力原文：How do you do？
(10)
A. Fine, thank you.
B. How do you do？
C. How are you？
听力原文：M: Before the class is over, you need to finish this exercise.
W: Can I do it after school？
Q: What is the relationship between the two speakers？
(17)
A. Father and daughter.
B. Teacher and student.
C. Mother and son.
听力原文：I want to see another film．
(8)
At a store.
B. At a school.
C. At a cinema.
The travel information is intended for
A. all passengers on board the plane.
B. passengers who want to visit the center of Sydney.
C. passengers who visit Sydney for the first time.
D. all crew on board the plane.
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