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Apassengertrainabout1,500peoplefellintotheriverwhenthebridgecollapsed.[]A.carryingB.carriedC.tobecarriedD.tocarry

题目详情
A passenger train ________ about 1,500 people fell into the river when the bridge collapsed.
[     ]
A. carrying  
B. carried
C. to be carried  
D. to carry
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答案和解析
A