—I came here by taxi and the driver ________ me 50 yuan.
—Really? You ________ by bus.
| A．paid; should come | B．cost; should have come |
| C．charged; ought to have come | D．spent; ought to come |
_____ the child to bed, she began to correct the pupil’s exercise.
| A．Sending | B．Being sent | C．Sent | D．Having sent |
____ with a difficult situation, Arnold decided to ask his boss for advice.
| A．To face | B．Having faced | C．Faced | D．Facing |
It was ______ back home after the experiment.
| A． not until midnight did he go | B． until midnight that he didn’t go |
| C． not until midnight that he went | D． until midnight when he didn’t go |
It was 1969___ the American astronauts succeeded in landing on the moon.
| A． that | B． when | C． on which | D． which |
______ with the size of the whole earth, the biggest ocean does not seem big at all.
| A． Compare | B． When comparing | C． Comparing | D． Compared |