The passage is primarily concerned with______.
A. informing readers of different sea creatures
B. describing predatory microscopic organisms
C. solving some long-lasting mysteries about the sea
D. discussing the environment for various fishes
查看答案
The word "they" underlined in Paragraph 1 refers to______.
A. organisms
B. fish
C. toxins
D. flesh
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.
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