At proper horse races everyone has already studied the form of the horse ______.
— What did Tina say just now? — She asked ____ this summer holiday.
Bill’s fully ____ from his heart disease. He is very happy.
While____the dog,you should take care not to____.Otherwise,it may be dangerous to strangers.
Tom ____ skating, so he spends all his spare time on it.
Having retired(退休), he ______ the club for old men and plays chess every day there.