单项选择题

The WHO has warned that______.

A．the skies over Mozambique have been too busy
B．malaria has risen sharply
C．medical services have not been available
D．medical staff is not enough
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单项选择题
The fleet operate on an average of______ flights per day.
A．50
B．100
C．150
D．200
单项选择题
______ will benefit from the 35 million-dollar program.
A．Ethnic minorities
B．Lower-income families
C．Former college students
D．African American families
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