___modeling business is by no means easy to get into,good models will always be in demand
| A．While |
| B．Since |
| C．As |
| D．If |
So difficult ______ it to work with him in the same company that I determined to find another job.
| A．I have felt | B．have I felt | C．I did feel | D．did I feel |
Only when you have finished your homework ______ go home.
| A．can you | B．would you | C．you will | D．you can |
It was in the street ______ I live that I met Mr. Green.
| A．that | B．which | C．where | D．when |
Was it in this hospital _______ she lived for ten years ______ she was trained to be a real nurse.
| A．that; which | B．which; that | C．where; that | D．that; where |
It was only when the war broke out ______ he began to realize everything was too late.
| A．until | B．that | C．then | D．so |