In my opinion, hard work is as important as, ______ an efficient way in study. [ ]

This week, the seems to change every day. One day is hot; the next day is cold.

With his work completed,the business man stepped back to his seat,feeling pleasedhe was a man of action.

Take care! There is a nail______of the chair.[ ]

26．PE will be part of the high school graduation examinations．______,you will have to be strong and healthy to graduate