______, the car stopped all at once.
| A．Seeing a boy lying on the ground |
| B．On seeing a boy sitting on the road |
| C．The driver saw a boy standing on the road |
| D．The minute the driver saw a boy seated on the road |
___we have satisfied you, you have no grounds of complaint.
| A．So | B．Since that | C．Now that | D．By now. |
Why these things happened was ____ the driver had been careless.
| A．because of | B．owing to | C．due to | D．that |
They had camped once before, ____ they knew what to take.
| A．because | B．now | C．so | D．since |
____ you are dismissed.
| A．Neither you go nor | B．Either you go or |
| C．Whether you go or | D．Both you go and |
He is very old,____ he still works very hard.
| A．but | B．if | C．when | D．as |