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请选择ABC4i/B3t6V9d+o9A3P(r/a+R4q;G.T — Here ________ your masks.:D;[4_/T'z5\'f*A

— Thank you.:D;[4_/T'z5\'f*A

A. are:D;[4_/T'z5\'f*A

B. do:D;[4_/T'z5\'f*A

C. is:D;[4_/T'z5\'f*A