The music he is playing sounds_____.

By now, when one makes a large purchase, he should have ___ opportunity to change his mind.

(2009湖南娄底重点高中联考)             students are required to take part in the boat race．

Journalists should always be     in what they write.

Many doctors complain that they don’t have ______ working hours, for they have to wait for patients all day long in the hospital.