No matter what changes have taken place, nobody can _______the fact that the experiment is a great success.
She _____ an old friend of hers yesterday while she was shopping at the department store.
A few _____ looked at him curiously when he suddenly stopped and burst out crying.
Changbai Mountain is one of China’s largest nature reserves, and has many ____ plants and animals.
Mrs. Green went back home hurriedly, where her two little twins were crying, _____ they were hungry.
Parents have a duty to ____ their children from the harmful effects of the Internet.