People all admire Karen very much. __________，all think she is a great musician.
| A．After all |
| B．As a result |
| C．In other words |
| D．As usual |
While I was in the foreign country, my younger brother always ____ me of what was happening in big cities in time.
| A．approved | B．accused | C．informed | D．warned |
With the word “PM2.5” ____ appearing in media reports, people pay greater attention to it and seek health tips for smoggy days.
| A．constantly | B．instantly | C．roughly | D．firmly |
After a careful survey about the cause of the newly-built bridge, they finally came to a(n) _________ that it was due to the heavy rain.
| A．construction | B．motivation | C．conclusion | D．impression |
He had to pause from time to time to wipe the sweat from his forehead, because the air-conditioning system ____.
| A．broke in | B．broke up | C．broke out | D．broke down |
Computers and mobile phones, though they are indeed making our life ____ and more ____, have reduced the need for face-to-face communications.
| A．easily; efficient | B．easier; efficient | C．easy; efficiently | D．easily; efficiently |