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
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