（）Anxiously, she took the dress out of the package and tried it on, only _________ id didn’t fit.
| A．to find | B．found |
| C．finding | D．having found |
He was about to leave the office for home _______someone knocked the door and asked for some help.
| A．until | B．while |
| C．as | D．when |
If you find yourself ______ no one will help you, please call me.
| A．which | B．when |
| C．where | D．what |
The government has taken some measures to solve the shortage of water, but it may be some time __ the situation improves.
| A．since | B．when. |
| C．unless. | D．before. |
— Why was it so noisy over there?
— The Twins were surrounded by their fans ____ they stepped out of the hall.
| A．until | B．the moment |
| C．in case | D．so that |
Among the many dangers_________-- sailors have to face, probably the greatest of all is fog.
| A．which | B．what |
| C．where | D．when |