问题
选择题
11. The pilot, whether ______ or design, made the plane do a sharp turn.
A．by accident
B．at times
C．suddenly
D．all at once
答案
答案：A
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11. The pilot, whether ______ or design, made the plane do a sharp turn.
A．by accident
B．at times
C．suddenly
D．all at once
答案：A