单项选择题

These are some of the （）of animal intelligence.

A.indications
B.tokens
C.omens
D.symptoms

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单项选择题

When she stood up to speak，her red straw fighting hat firmly（）place，the crowd began to boo her.

A.at
B.with
C.in
D.on

单项选择题

When he was 20，John Stuart Mill（）a serious mental crisis.

A.supplied
B.surprised
C.suffered
D.suggested

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