-When _______ your mother _______ you that blue dress, Mary?

-Sorry, I really can't remember.

A．does; buy

B．has; bought

C．had; bought

D．did; buy

乌龙茶属于（）。

A.发酵茶类

B.半发酵茶类

C.不发酵茶类

D.再加工茶

E.不加工茶