红斑狼疮的临床表现分为：盘状红斑狼疮、亚急性皮肤型红斑狼疮和（）
参考答案：亚急性皮肤型红斑狼疮皮疹
—Did you know any Chinese before you arrived in Beijing?
—Never ________ it, actually．
A．had I learned
B．have I learned
C．I have learned
D．I had learned
