As environment protection is becoming _______ public concern, _______ government is determined to pay more attention to the issue.
Those experienced doctors in our country _______the meeting in order to find out the real_______ of bird flu(禽流感).
I shall never forget the days_________ I lived with my parents as a child, _________ has a great effect on my life.
If you cheat in the exam, you could hardly _________ it.
Don’t worry about Mary. _______ , she is no longer a child any more.
Some office workers often go to the gym to _______ regularly so that they can keep fit.