So difficult ______ it to work with him in the same company that I determined to find another job.
277. If you want to get there quickly, you'd better take the track in the forest. The underlined word means ____.
276. We should take good care of our ____. Don’t forget to rinse your mouth after meals.
275. A telephone is an instrument by which we can speak to people far away. The underlined word means ____.
274. Believe it or not, two ____ is worth an egg.
273. Which of the following is not a container?