With the word “ PM2.5” ________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.

With electricity _______ because of the road repairs, the whole building was completely dark.

Mr. Brown is an experienced doctor. He is always         when faced with emergency.

From his________look，I could see that he didn’t believe what I said.

Thousands of people turned out into the streets to ________ against the local authorities’ decision to build a highway across the field.