As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.
_______ in the leg made it impossible for him to walk home.
The parade went_______the streets to celebrate the traditional festival.
When _______cruel man was hurting the children, there were no adults around who were able to stop______hurting.
Helen devoted herself _______ to her research and became a top scientist in the field of applied physics.
Vitamin D helps our bodies make a special chemical,and this special chemical, __________,affects our brains,making us feel happy.