579.Students should be able to think for themselves ______ just obeying teachers.

A.in case of

B.besides

C.except

D.instead of

580.Could you possibly tell me what to do with such sort of situation?

It's no good asking me all the time,Anna.You'll have to learn to think _______ yourself.

A.of

B.to

C.by

D.for

579.答案是D;

instead of 而不是。

580.答案是D;

of oneself 自动地；by oneself独自；for oneself亲自，为自己。