单项选择题

His teacher ______ concern about the progress he had made at school.

A．expressed
B．exported
C．exploded
D．exposed
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单项选择题
Which of the following is NOT mentioned as a factor of accidents
A．Mood.
B．Tiredness.
C．Carelessness.
D．Weather.
单项选择题
What do you think would be the best title for the passage
A．Accidents and Anxiety.
B．How Accidents Are Caused.
C．Human Factors in Accidents.
D．How to Prevent Accidents on Roads and in Factories.
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