单项选择题

A．One-fourth.
B．One-fifth.
C．One-third.
D．a half.
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单项选择题
A．They didn’t hear the call.B．They didn’t think it is serious.C．They met iceberg too.D．They were not fast enough.
A．They didn’t hear the call.
B．They didn’t think it is serious.
C．They met iceberg too.
D．They were not fast enough.
单项选择题
A．Working for oil companies.B．Working for medical organizations.C．Working for UN inspection teams.D．Working for NGOs.
A．Working for oil companies.
B．Working for medical organizations.
C．Working for UN inspection teams.
D．Working for NGOs.
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