单项选择题

A．Beginning.
B．Intermediate.
C．Advanced.
D．It"s hard to say.
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单项选择题
A．Global warming in Antarctica.B．Penguins in Antarctica.C．Tourism in Antarctica.D．Environmental protection in Antarctica.
A．Global warming in Antarctica.
B．Penguins in Antarctica.
C．Tourism in Antarctica.
D．Environmental protection in Antarctica.
单项选择题
A．Before 8 p.m.B．After 8 p.m.C．Before 9 a.m.D．Between 9 and 9:30 a.m.
A．Before 8 p.m.
B．After 8 p.m.
C．Before 9 a.m.
D．Between 9 and 9:30 a.m.
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