单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage.
What is the topic of this talk

A．The salinity of the ocean.
B．Pollutants found at sea.
C．The composition of coral reefs.
D．The weather patterns of coastal areas.

<上一题目录下一题>

热门试题

单项选择题

单项选择题

Questions 18 to 20 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. What is the topic of this talk 您的浏览器不支持 audio 元素。