20．Always read the label ______ you wash your clothes．
| A．before | B．unless | C．since | D．Until |
I would like to see more attention to forms of transportation that are not private cars.
| A．pay |
| B．be paid |
| C．to pay |
| D．paid |
When the minister came to the snow-stricken area, he was happy to see the disaster victims well ________.
| A．take care of |
| B．took care of |
| C．taken care of |
| D．taking care of |
It’s surprising that your brother Russian so quickly--- he hasn’t live there very long.
| A．picked up |
| B．looked up |
| C．put up |
| D．made up |
Kids don’t learn their native language , but they become fluent in them within a few years.
| A．consciously |
| B．effectively |
| C．carefully |
| D．naturally |
such heavy pollution already, it may now be too late to clean up the river.
| A．Having suffered |
| B．Suffering |
| C．To suffer |
| D．Suffered |