单项选择题

When was oil first discovered in the Middle East

A．In the end of the ninetieth century.
B．In the early twentieth century.
C．In the early nineteenth century.
D．At the end of ninetieth century.
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It was not until he had arrived home ______he remembered his appointment with the lawyer.
A．that
B．where
C．when
D．which
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______more time, we will be able to come up with a better solution to the problem.
A．Given
B．To give
C．Giving
D．Be given
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