单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．One.
B．Four.
C．Five.
D．None.
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单项选择题
A．The stem of the nettle.B．Small stinging hairs on the nettle’s stem.C．The sap of the nettle.D．The slender nettle.
A．The stem of the nettle.
B．Small stinging hairs on the nettle’s stem.
C．The sap of the nettle.
D．The slender nettle.
单项选择题
A．Identifying and collecting food.B．Protecting themselves.C．Eating food.D．Fighting against the enemies.
A．Identifying and collecting food.
B．Protecting themselves.
C．Eating food.
D．Fighting against the enemies.
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