Persons under18 not be employed in night work in the United States.
The disabled girl________an active life played a________role in the film.
When he saw the________bear, his face turned pale ________.
There is no doubt that IT plays ________important role as a new teaching tool in this era of technology.
--- Did -you catch the early bus yesterday?--- No,it _________ by the time I _________ the bus station.
The man_________at the meeting is a very famous writer.