As the quality of the city’s air continues to give rise to ______, the residents are encouraged to set off fewer fireworks.
---Are my clothes too casual? ---No. You can go__________you are.
More and more people shop online,________advantage of low prices.
The Day of the Dead, an ancient Mexican festival, is not a sad day, but _________time to celebrate__________cycle of life.
How_________I help them to understand when they won’t listen to me?
In summer, food will go bad if_________in room temperature.