---Sorry, I don’t know what the teacher said just now.

----He asked Maria ________.

A．how long she usually spends on her homework

B．what she was doing these days

C．why didn’t Mike come to the meeting yesterday

D．when the speech will begin

教育目的的特点有：客观性、（）时代性。

A.抽象性

B.主观性

C.实在性