摘要： I arrived at the airport the plane had taken off. A. after B. while C. when D. before
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I arrived at the airport _____the plane had taken off.
[ ]
A. after
B. w
hile
C. when
D. before
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B. w
hile C. when
D. before
I arrived at the airport ______ the plane had taken off.
[ ]
A. after
B. while
C. when
D. before
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B. while
C. when
D. before
---------I arrived at the airport the plane had taken off.
|
A．after |
B．while |
C．when |
D．before |
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