He came to my class every week, but his attitude ______ he was not really interested in the subject.

If you sit in an office all day long and rarely _____, you’re likely to suffer from neck andback pains.

—I’m thinking about withdraw (退出)from the committee.—Think it over. Once you decide, you won’t be ______ to the committee again.

We always keep ____ gas in case we run out.

More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.