单项选择题

The crow was finally deceived because ______.

A．it was not afraid of the men in the tower
B．it did not have a number sense
C．it could not distinguish between four and five
D．four men left the tower

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热门试题

单项选择题

The passage is mainly about

A．how to be a do-it-yourselfer
B．the Do-It-Yourself Movement
C．the future of the Do-It-Yourself Movement
D．the origin of the Do-It-Yourself Movement

单项选择题

We can conclude from this passage that number sense in animals appears to be ______.

A．restricted to about one dozen species or less
B．akin to a faculty possessed by men in all stages of development
C．present chiefly in winged creatures
D．related directly to preservation or offspring