The athletes made great progress by ________ (科学的) training.
The bell rang,  _________ (宣布，宣告) the end of the class.
The troop covered _________ (粗略地，大约) 80 miles a day.
The beauty of the sunset was beyond _________ (描述).
__________ (代表)  of many nations at the peace talks are working towards an agreement.
He__________ (溜进) into the small room without being noticed.
You must __________ (集中)  all your energies on the study of English.
We were __________ (通知) by mail of the change in plans.
New technology is being _________(应用于) to almost every industrial process.
We _________(款待) my friend Susan to lunch at the Sayon.