It is useful book. I borrowed it from school library.
| A．an ; a | B．a ; an |
| C．an; the | D．a ; the |
The Greens moved to China a few years________．
| A．before |
| B．ago |
| C．late |
| D．／ |
—Listen！Who________the piano？
—My sister．
| A．is playing |
| B．plays |
| C．played |
| D．play |
To be a policeman is interesting________sometimes it’s kind of dangerous．
| A．and |
| B．or |
| C．but |
| D．so |
—I’ve shown you all the interesting and important places of our school．
—Thank you for________so much time．
| A．taking |
| B．spending |
| C．costing |
| D．having |
________energy，turn off the hot water after you take a shower．
| A．Save |
| B．Saving |
| C．Saved |
| D．To save |