13. I don’t remember _____ you in class. Is this your first lesson?
(A) seeing
(B) to see
(C) I had seen
(D) be seeing
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統計: A(103), B(26), C(33), D(2), E(0) #3102651
統計: A(103), B(26), C(33), D(2), E(0) #3102651