The classroom is big enough________， but we'll have to move if we have more students.
| A．for the moment |
| B．on the moment |
| C．in a moment |
| D．for a moment |
Air and the sun's rays create much distortion, and whatever tends to _____ their influence is useful to the astronomer.
| A．exclude | B．eliminate | C．extinguish | D．impose |
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 |