单项选择题

A. Two important tests of a new airliner because it is put into use.
B. How to carry out tank test in the water.
C. How pilots carry out the test flights.
D. How to make a safe passenger plane.
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单项选择题
A. It’s not important how he dances. B. It’s too crowed to dance anyway. C. If he’s careful, no one will notice. D. No one knows the steps to the dance.
A. It’s not important how he dances. B. It’s too crowed to dance anyway.
C. If he’s careful, no one will notice. D. No one knows the steps to the dance.
单项选择题
A. The director probably isn’t able to make an exception. B. The director probably won’t see her. C. The director usually isn’t very helpful. D. Part-time students aren’t the director’s responsibility
A. The director probably isn’t able to make an exception.
B. The director probably won’t see her.
C. The director usually isn’t very helpful.
D. Part-time students aren’t the director’s responsibility
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