An excellent musician can not only sing songs wonderfully but also ______ songs and even play several kinds of musical instruments.
| A．direct | B．compose | C．perform | D．act |
______ 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 |
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 |