单项选择题

What kinds of things have activists done to protect research animals（）

A．Set them free.
B．Damage the labs.
C．Sent threatening letters.
D．All of the above.

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单项选择题

The purpose for the activists to be against researchers is （）

A．to see the animals
B．to protect animal's rights
C．to stop scientific research
D．to fight with police

单项选择题

What will happen if the researchers don't meet the demands made in the letter from the activists（）

A．The activist will release all the animals.
B．The activists will use violence against the researchers.
C．The activist will commit vivisection.
D．In the autumn of 2000, the activists will send more letters.