—I’m sorry, but there’s no smoking in this section on the train.
—Oh, I ______ that, and I won’t again.
A.don’t know | B.didn’t know | C.won’t know | D.haven’t known |
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—I’m sorry, but there’s no smoking in this section on the train.
—Oh, I ______ that, and I won’t again.
A.don’t know | B.didn’t know | C.won’t know | D.haven’t known |