单项选择题

A．As much as 93%.
B．As much as 80%.
C．As much as 75%.
D．As much as 60%.
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单项选择题
A．How to care for precious metals.B．A standard unit for measuring weight.C．The value of precious metals.D．Using the metric system.
A．How to care for precious metals.
B．A standard unit for measuring weight.
C．The value of precious metals.
D．Using the metric system.
单项选择题
A．He was ill for more than a month.B．He was ill but had a happy holiday.C．His holiday was ruined because of his illness.D．He was in bed for a week.
A．He was ill for more than a month.
B．He was ill but had a happy holiday.
C．His holiday was ruined because of his illness.
D．He was in bed for a week.
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