单项选择题

Questions 14 to 16 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.
Why did the speaker take a soil sample from his garden

A．To show how common microbes are.
B．To prove how well his gardening methods work.
C．To provide an example of an uncommon mold.
D．To diagnose why his plants are sick.

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单项选择题

What is the man’s opinion of the assignment

A．The assignment will improve their public speaking skills.
B．The assignment will help them meet people in their field.
C．The assignment is more difficult than he had expected.
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单项选择题

What is the main idea of this report

A．An Ethiopian plane has crashed due to terrorist attack.
B．An Ethiopian plane has crashed with no survivors found.
C．Heavy storm has caused an Ethiopian plane crash.
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Questions 14 to 16 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. Why did the speaker take a soil sample from his garden 您的浏览器不支持 audio 元素。

Questions 14 to 16 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.
Why did the speaker take a soil sample from his garden