单项选择题

The teller of a humorous story （）.

A．laughs at his own joke
B．repeats it several times
C．is very serious when he tells it
D．is concerned about the reaction of his listeners

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热门试题

单项选择题Flying foxes tend to（）.

A．double their number every year
B．lose a lot of their babies
C．move from place to place constantly
D．fight and kill a lot of themselves

单项选择题In Papusek’s experiment babies make learned movements of the head in order to（）

A．have the lights turned on
B．be rewarded with milk
C．please their parents
D．be praised