With the word “ PM2.5” ________ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
By the time he was 50, he had become president of company.
— Mike, let’s go to the cinema tonight! — _________, if you insist.
__________the house costs, it will _____________it.
— Look! You’ve made the same mistake again! — Oh, not again! _________ such a mistake.
These old pictures __________ the unforgettable days _______ we spent on the farm.