He is very old, ______ he still works very hard.
| A．but | B．if | C．when | D．as |
29. A very beautiful scene spreads in front of the mountain, at the foot of which ______.
| A．lies a small village | B．does a small village lie |
| C．a small village lies | D．is lying a small village |
28. What was unexpected was that the disrespectable fellow ______ the old man.
| A．could have robbed | B．should have helped | C．should rob | D．might have helped |
27. I wonder whether the police ______ that lost child or not
| A．have found | B．has been found | C．have been found | D．has found |
26. Jerry, why ______ you leave your things on the floor like this?
| A．would | B．need | C．must | D．May |
25. When Jack reached the station the train ______ for ten minutes.
| A．had gone | B．had set off | C．had been away | D．had left |