单项选择题

It can be concluded that a concentration of carbon dioxide in the atmosphere would ______.

A．prevent the sun's rays from reaching the earth's surface
B．mean a warming up in the climate in the Arctic hemisphere
C．account for great changes in the climate in the northern hemisphere
D．raise the temperature of the earth's surface

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单项选择题

According to the passage, which of the following is true

A．Marketeers should be responsible for the burdens of the past.
B．Marketeers should separate themselves from their personal and cultural history.
C．Marketeers should disagree on racial prejudices.
D．Marketeers should take care of the wounded in the war.

单项选择题

According to the passage, which of the following is NOT true

A．The failure of the reopened trade between America and Vietnam should be taken as a lesson.
B．The Vietnamese take it for granted that the American business community will invest money in Vietnam to make up for past wrongs.
C．The relationship between Vietnam and the US is a good example of forgetting the past.
D．Misinterpreting history and culture leads to business failure.