单选题
Hardly （ ）the helicopter （ ）when the waiting crowd ran towards it.
问题1选项
A.had...landed
B.has...landed
C.would...land
D.was...landing
A.had...landed
B.has...landed
C.would...land
D.was...landing
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Hardly （ ）the helicopter （ ）when the waiting crowd ran towards it.
