27. Great changes _______in our city in the past twenty years.
| A．have been taken place | B．have taken place |
| C．took place | D．were taken place |
The filling station _____ because there were too many others on the street.
| A．fell through | B．went under | C．fell out | D．went through |
His job at the hospital did not pay much, so he found another _____.
| A．on the rise | B．on the spot | C．on the decline | D．on the side |
At first Bob was puzzled by Virginia s waving, but then it _____ his mind that she was trying to tell him something.
| A．crossed | B．passed | C．occurred | D．opened |
Jim isn't _____, but he did badly in the final exams last semester.
| A．gloomy | B．dull | C．awkward | D．tedious |
The manager said that they had an _____ plan if the plan they had submitted was not accepted.
| A．alternate | B．alternative | C．absolute | D．appreciable |