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.
Which is the height of towers at Sky Greens vertical farm?（）

A．9 meters.
B．20 meters.
C．100 meters.
D．40 meters.

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单项选择题

Miss Parkinson became interested in her own business（）

A．before she worked for the media company
B．when she was on holiday five years ago
C．after she went to therapists and classes
D．after her friend recommended it to her

单项选择题

Which of the following is NOT mentioned about the single-lens reflex? （）

A．Different lenses can be used.
B．Focusing is easier.
C．You can see what you are taking.
D．It is cheaper and lighter.

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. Which is the height of towers at Sky Greens vertical farm?（）

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.
Which is the height of towers at Sky Greens vertical farm?（）