21．This book is said to be a special one, which____many events not found on other history books.

The police chief advised his men to keep________ and not lose their tempers.

The sick man’s allowed to take a walk in the gardenevery day, ________ — Yes, I think so.

weather permits, we’ll have anouting.

When he was still very young，Ba Jin ________ the reputation he still enjoys today as one of China’s greatest writers.[ ]