________ theory，everyone must obey the rules，but ________practice，there are a few people who don’t obey the rules.
| A．In；on |
| B．On；in |
| C．In；in |
| D．On；on |
you’ve got a chance, you might as well make full use of it.
| A．Now that | B．As if | C．Even if | D．As soon as |
The hotel is always full of people because it offers a friendlyand personal service.
| A．surface | B．atmosphere | C．system | D．appearance |
In thisconflict, about 20 common people were killed.
| A．gentle | B．violent | C．fundamental | D．harmful |
The harm the modern farming methods have donethe countryside is considerable.
| A．on | B．at | C．to | D．for |
Some brave soldiers were chosen to _______ the order of saving the children in danger.
| A．get across | B．put on | C．stand for | D．carry out |