Everything from greeting to eating can be an opportunity to do the wrong thing, and not only embarrass yourself, but _______ your host.
| A．scare | B．upset | C．tease | D．blame |
Lisa was punished by her mother because she went out to play __________ her homework unfinished.
| A．with |
| B．before |
| C．after |
| D．of |
With the word “PM2. 5” constantly __________ in media reports, you might be wondering what on earth it means.
| A．appeared |
| B．appearing |
| C．to appear |
| D．being appeared |
With the audience __________ at her, the little girl felt nervous on the stage.
| A．staring |
| B．to stare |
| C．stare |
| D．stared |
Half the world's population __________ water shortages within 15 years according to the World Bank, just one of many recent alarming reports on the world's fresh water supply.
| A．are suffering |
| B．have been suffered |
| C．will suffer |
| D．were suffered |
It is reported that in our country cities __________ heavy air pollution that is 30 percent above the national standard or higher should try to meet standards by 2030.
| A．suffering |
| B．suffer |
| C．suffered |
| D．are suffering |