--Who should be responsible for the accident?
-- The boss, not the workers. They just carried out the order .
| A．as told | B．as are told |
| C．as telling | D．as they told |
_______ a pair of compasses, it is easy to describe a circle.
| A．Having | B．To have had |
| C．If you have | D．if having |
“May I go and play with Dick this afternoon, Mum?” “No, you can’t go out _______ your work is being done.”
| A．before | B．until |
| C．as | D．the moment |
But for the help you gave me, I _______ the examinations.
| A．would have passed | B．would pass |
| C．wouldn’t have passed | D．wouldn’t pass |
When a pencil is partly in a glass of water, it looks as if it ______.
| A．breaks | B．has broken |
| C．were broken | D．had been broken |
You didn’t let me drive. If we ____ in turn, you ____ so tired.
| A．drove; didn’t get | B．drove; wouldn’t get |
| C．were driving; wouldn’t get | D．had driven; wouldn’t have got |