单项选择题

A．To commemorate a historic flight,
B．To try out eight new balloons.
C．To recruit balloonists from all over the United States.
D．To test whether helium (氦气) balloons are better than hot-air balloons.
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单项选择题
A．A comparison between conscious and unconscious behavior patterns.B．Recent developments in psychology research.C．Reasons for certain behavior patterns.D．Reasons for being late.
A．A comparison between conscious and unconscious behavior patterns.
B．Recent developments in psychology research.
C．Reasons for certain behavior patterns.
D．Reasons for being late.
单项选择题
A．Because they can’t afford to.B．Because they prefer the apartments near their workplace.C．Because a mobile home is more convenient as they move from place to place.D．Because small houses are easy to redesign.
A．Because they can’t afford to.
B．Because they prefer the apartments near their workplace.
C．Because a mobile home is more convenient as they move from place to place.
D．Because small houses are easy to redesign.
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