单项选择题

Shares on the stock market have_______as a result of a worldwide economic downturn.

A．turned
B．changed
C．floated
D．fluctuated
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单项选择题
A．amplerB．largerC．broaderD．wider
A．ampler
B．larger
C．broader
D．wider
单项选择题
This is an illness that can result in total blindness_______left untreated.
A．after
B．if
C．since
D．unless
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