单项选择题
How many children die every day from malnutrition and preventable diseases according to the UN estimation
A．Twenty-five thousand.
B．Fifty-five thousand.
C．Forty-five thousand.
D．Thirty-five thousan
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单项选择题
The artist named Wyland is now ______.
A．saving the whales in the ocean
B．painting giant outdoor murals
C．teaching people about nature
D．celebrating the environment
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单项选择题
For how long have the heavy rains been falling
A．Four days.
B．For days.
C．Four weeks.
D．For weeks.
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