The pilot,(飞行员) whether ______ or on purpose, made the plane do a sharp turn.(急转弯)
A.by accident | B.at times | C.suddenly | D.at once |
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The pilot,(飞行员) whether ______ or on purpose, made the plane do a sharp turn.(急转弯)
A.by accident | B.at times | C.suddenly | D.at once |