255. The college entrance examination is drawing near and all the students are ploughing through their studies. What does the underlined part means _____.
Many years ago, he dreamed of becoming the first person __________ both South and North Poles.
The __________ of his aim depends largely on himself.
I was about to go out __________ he came in.
The goods __________ well, so they __________ out quickly.
We can say __________ that their work is on the path of sound development.