单项选择题

According to some biologists, the instinct to care for the young is perhaps the most interesting characteristic of animals.()

A.actually
B. surprisingly
C. seldom
D. possibly

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单项选择题

California, the first city on the American continent, reached its peak of development and power about AD 1100.()

A.summit
B. tip
C. height
D. apex

单项选择题

In the book Autobiography of Values, the aviation hero Charles Lindbergh reveals his paradoxical and often sobering thoughts on life.()

A.contradictory
B. poignant
C. mystic
D. paramount

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