--Do you think it's possible the train will be late?---______.

A．Of course

B．Yes, perhaps

C．I think possible

D．Both A and B

下列何组为我国乙类传染病（）

A.淋病、梅毒、艾滋病、沙眼衣原体

B.淋病、梅毒、艾滋病、性病性淋巴肉芽肿

C.淋病、梅毒、软下疳

D.淋病、梅毒、性病性淋巴肉芽肿

E.淋病、梅毒、艾滋病