Medical education and engineering education belong to totally different categories and are always on ________ tracks, it is difficult to develop cross-subjects between them.

150. — Would you pleaskJohn for help. He has the goods. The underlined part probably means _____.

Try to be more careful next time. Carelessness only________ mistakes.

The old man lives ____ but he doesn’t feel____.

orning, I rushed to the library, only ________ that its door was still locked.