问题
选择题
It was probably _______ the wrong operation(操作) of the pilot that caused the plane to crash.
A．because of
B．because
C．as a result
D．\
答案
答案：D
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It was probably _______ the wrong operation(操作) of the pilot that caused the plane to crash.
A．because of
B．because
C．as a result
D．\
答案：D
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