15．－Tom, you've got an A in the final English exam. Congratulations!
－Thanks. But I never thought the result would e out so fast. The papers when I left the teacher's office just now.
A. were marking
B. were marked
C. were being marked
D. had been marked
网友回答
A. were marking
B. were marked
(答案→)C. were being marked
D. had been marked
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