He put up a picture of Yao Ming beside the bed to keep himself ________ of his own dreams.

_______ that he made an obvious mistake, Jeff went on with his speech.

____ to the Qin Dynasty，the traditional crosstalk shows have made people roar with laughter.

The excellent student, _______ abroad for many years, is on the way back to her own country.

Henry Ford’s introduction to the assembly line vastly reduced the time it look _____.