--I came two idioms which puzzled me on the cover of an old book which I was looking for a new material in yesterday.
---Why not go to the teacher for about them?
A. with, an advice
B. to . advice
C. across, advice
D. up, advice
网友回答
A. with, an advice
B. to . advice
(答案→)C. across, advice
D. up, advice
解析：e across 意思是: 偶然发现/见到, for这里表示目的, for advice意为: 征求意见.