单项选择题

It took()years for world population to grow from 1 billion to 3 billion.

A.100
B.115
C.130
D.145

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单项选择题
A population explosion will lead to()

A.a lot of social problems
B.medical advances
C.a decrease in food production
D.a worse life in every nation with 3 billion

单项选择题
The increase in international business has created a need for manager with skills in cross-culture communication.()

A.国际贸易增加了跨国文化交流的机会,也提高了经理的技能。
B.国际贸易提高了对经理掌握跨国文化交流技能的要求。
C.国际贸易的增加需要具有跨国文化交流技能的经理。
D.国际贸易增加了对经理文化交际能力的需求。

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