单项选择题

Starting with the premise that there is life on the planet Mars, the scientist went on to develop his argument.

A．pretext
B．foundation
C．presumption
D．presentation
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单项选择题
Growing economic problems were highlighted by a slowdown in oil output.
A．accounted for
B．worked out
C．made prominent
D．taken for granted
单项选择题
The mother is told that her child is desperately ill—the chances of survival are slim, and treatment is as dreadful as the disease.
A．incurable
B．fearful
C．impossible
D．troublesome
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