单项选择题

A．5,400,000 years.
B．65,000,000 years.
C．8,400,000 years.
D．75,000,000 years.
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单项选择题
A．Taking notes.B．Oiling the gate.C．Singing high notes.D．Overcoming her weakness.
A．Taking notes.
B．Oiling the gate.
C．Singing high notes.
D．Overcoming her weakness.
单项选择题
A．There aren’t enough cabinets.B．There is too much noise.C．Office supplies take up too much space.D．Some teaching assistants don’t have desks.
A．There aren’t enough cabinets.
B．There is too much noise.
C．Office supplies take up too much space.
D．Some teaching assistants don’t have desks.
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