单项选择题

Questions 29 to 31 are based on the passage you have just heard.

A．Quiet plants.
B．Well-watered plants.
C．Healthy plants.
D．Thirsty plants.
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单项选择题
A．Whether global warming will speed up in the future.B．Whether it will lead to widespread food shortage.C．Whether it can be detected and checked.D．Whether it will affect their own lives.
A．Whether global warming will speed up in the future.
B．Whether it will lead to widespread food shortage.
C．Whether it can be detected and checked.
D．Whether it will affect their own lives.
填空题
demonstrate
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