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单项选择题

Questions 9 to 11 are based on the conversation you have just heard.

A．It was by continuous exploitation of the environment.
B．It was by unceasing evolution.
C．It was by lacking of competition between species.
D．It was by chance initially and by cleverness now.
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单项选择题A．Languages are sometimes inseparable with cultures.B．A foreign culture is more important than its language.C．One should learn culture before learning a language.D．Culture is the key to understand a foreigner.

A．Languages are sometimes inseparable with cultures.
B．A foreign culture is more important than its language.
C．One should learn culture before learning a language.
D．Culture is the key to understand a foreigner.

单项选择题A．Look at the audience directly.B．Look at something else in the room.C．Be better prepared before presentation.D．Ask psychologists for help.

A．Look at the audience directly.
B．Look at something else in the room.
C．Be better prepared before presentation.
D．Ask psychologists for help.