单项选择题

A．To keep your eyes a bit drier.
B．To protect your eyes from infection,
C．To cry for your sadness only.
D．To conceal your happiness.
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单项选择题
A．He was a doctor.B．He was a writer.C．He was an actor.D．He was a teacher.
A．He was a doctor.
B．He was a writer.
C．He was an actor.
D．He was a teacher.
单项选择题
A．When the plane was up in the sky.B．Ten minutes after he was sitting on board.C．Just before he fastened his seat belt.D．While he was enjoying the beauty of the sky.
A．When the plane was up in the sky.
B．Ten minutes after he was sitting on board.
C．Just before he fastened his seat belt.
D．While he was enjoying the beauty of the sky.
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