ou know Anna’s telephone number——____. As a matter of fact, I don’t knowany Anna, either.

If we don’t take steps, some rare animals, such as the Tibetan antelopes and pandas will ____________ some day just as dinosaur.

Although he has been studying abroad,his parents try to keep him ________ of what has happened at home. []

Such exchange students________have a good knowledge of English will not worry about their daily life in America.

The book is of great value. ______ can be enjoyed unless you digest it.