No one can exactly tell us what .
| A．does Mona Lisa’s smile mean |
| B．Mona Lisa’s smile means |
| C．Mona Lisa’s smile does |
| D．does Mona Lisa’s smile |
—Are you learning art now during your spare time?
—No, I’ve stopped ________ Chinese medicine instead.
| A．to learn | B．learning |
| C．dropping | D．to give up |
—Were you late ________ the meeting?
—No, I arrived there ten minutes________ the meeting started.
| A．for ; before | B．at ; before |
| C．for ; till | D．at ; after |
You can find ________ become more difficult to see clean rivers in our city.
| A．that has | B．it has | C．it | D．this has |
It’s raining so________that there are________any people in the street.
| A．heavy; hard | B．hard; hard |
| C．heavy; hardly | D．hard; hardly |
The family________ at the lunch table when someone came to tell them what had happened at ________.
| A．were sitting; Mr Brown | B．were sitting; Mr Brown’s |
| C．was sitting; Mr Brown | D．was sitting; Mr Brown’s |