单项选择题

A．the rapid growth in world oil consumption
B．the rise of China and India
C．the construction of new pipelines is becoming more difficult
D．the rise of oil price
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单项选择题
A．Revolutionary WarB．the First World WarC．wars involved AmericaD．the Civil War
A．Revolutionary War
B．the First World War
C．wars involved America
D．the Civil War
单项选择题
A．In 1868B．In 1886C．In 1898D．In 1889.
A．In 1868
B．In 1886
C．In 1898
D．In 1889.
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