School children must be taught how to deal with dangerous .
Previously ______ at a fast food restaurant, the Smiths were dissatisfied with the unhealthy meals they served there.
The story shows that _______ knowledge of _______ first aid can make ______ real difference.
Some students interested in biology have _____________to the classroom with electric facilities.
Ding Junhui ,___________most famous snooker player ,is ____________quiet young man.
He ____________up early since his childhood.