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