All day long， by the side of the road ______， looking at the passing cars and people.
| A．was he sitting | B．sat he | C．did he sit | D．he sat |
_______ the sun rising slowly in the east, the scene is a perfect dream.
| A．Seeing | B．To be seeing |
| C．When you see | D．Having seen |
______ for something, a receipt is given to you.
| A．Paying | B．Having paid |
| C．When you have paid | D．To be paying |
_______ 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 |