问题
单项选择题
When intruded, a territorial animal will only perform some hostile（）to warn off the intruder.
A.behaviors
B.actions
C.signs
D.gestures
答案
参考答案：D
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When intruded, a territorial animal will only perform some hostile（）to warn off the intruder.
A.behaviors
B.actions
C.signs
D.gestures
参考答案：D