Selected English broadcasts

This is a problem of word meaning analysis. First of all, look at the meaning of four words, which have been given as follows. Read the meaning of the whole sentence again.

Often, sometimes

Therefore, inevitably; Therefore, therefore; Finally, like this; The logical inference is that

Permanently, permanently

Right away. immediately

With the word pm2.5 appearing in the news media for a long time, people pay more attention to it and look for ways to keep healthy to deal with smog weather. I don't know the translation of every word, but it means reading it several times.

C emphasizes the key point of high frequency more than option A, indicating that people pay more attention to pm2.5, but option A can't. Read it a few more times to understand. ~