问题
What did you say to Julia? I saw her crying in the dormitory alone. — It ______ my fault. We talked happily when I was with her in the classroom.
A:mustn’t have been
B:should have been
C:shouldn’t have been
D:couldn’t have been
B:should have been
C:shouldn’t have been
D:couldn’t have been
正确答案是：
同类题型
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