With the ______word “ PM2.5” constantly appearing in _____media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．the; / | B．the; the |
| C．a; the | D．a; / |
He has written a lot of books, but ______ good ones.
| A．any | B．some | C．few | D．many |
Everyone here will thank the firefighters for the things they do to prevent fires ______ the environment safer.
| A．to make | B．make | C．making | D．from making |
If Newton lived today, he would be surprised by what ______ in science and technology.
| A．had discovered | B．had been discovered |
| C．has discovered | D．has been discovered |
Does John know any other foreign language ______ English?
| A．except | B．besides | C．but | D．beside |
Life is just like a journey with ______ unknown destination, during which people can meet with ______ barriers of all kinds.
| A．/; the | B．the; / | C．an; the | D．an; / |