问题
选择题
The coal miners________in the coal mine for 10 hours before we came to their rescue.[ ]
A．had trapped
B．had been trapping
C．had been trapped
D．would have been trapped
答案
答案：C
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The coal miners________in the coal mine for 10 hours before we came to their rescue.[ ]
A．had trapped
B．had been trapping
C．had been trapped
D．would have been trapped
答案：C