请选择ABC'}1Z*i9M4P9Q9?.r8r3d --- ____________ day is it?.m2v5A0a-F7X.Q6h1[1b
-- It's Monday..m2v5A0a-F7X.Q6h1[1b
A. What's B. What C. When.m2v5A0a-F7X.Q6h1[1b