--- Can I go out and play football with my friends, mum?

--- Sorry, my dear. I am afraid you have to stay at home if your bedroom ________.

A．isn't cleaned up

B．is cleaned up

C．will be cleaned up

D．cleans up

与肥大细胞产生的变态反应密切相关的疾病是（）

A.银屑病

B.瘢痕疙瘩

C.荨麻疹

D.湿疹