1．Concerned (concern) about his wife's safety，he rang her up.
2．They made a bargain with us，but they are trying to break it off.
3．We will adopt his suggestion that the leading body (should)_be_recognized (recognize) as soon as possible.
4．He hurried to his house only to_find(find) his house broken into.
5．Once a teacher，he now works in a government office.
Ⅱ.单句改错
1．The box included many kinds of books.included→contained
2．I'm shameful that I have troubled you so many times.shameful→ashamed
3．Be sure to drop in at me when you can spare a moment.at→on
4．He made a determining effort to give up smoking.determining→determined
5．Everyone should be concerning about the future of his own country.
concerning→concerned
