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 |
推荐套卷
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 |