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单项选择题

The number of patients who died of the Ebola-like disease in southern Sudan has now been up to

A．fifteen
B．four
C．eleven
D．twenty

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单项选择题According to Dr. Walker, which can describe the newly reported disease most appropriately

A．The newly reported disease holds a mortality rate of 50 percent.
B．The virus of the disease can be spread through contract with infected sweat.
C．Ninety percent of patients infected by the virus die of the disease.
D．The virus of the disease can only be carried by desert rats and primates.

单项选择题Countries can be eligible for the Millennium Challenge Account only if ______.

A．they can prove they are developing countries badly wanting foreign assistance
B．they can show their will to do anything necessary to combat poverty
C．they have already succeeded in carrying out economic and political reforms
D．they can get a substantial increase in economy and politics in several years