中国石油大学 / 中石油
正确率:100%
1. A: Is this seat taken? B: ______________ .
A、No, help yourself.
B、Yes, you can’t sit.
C、Yes, it was
D、No, it is taken.
A、No, help yourself.
B、Yes, you can’t sit.
C、Yes, it was
D、No, it is taken.
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