____ modeling business is by no means easy to get into, the good model will always be in demand.
We were told not to touch the equipment in the laboratory unless ________.
------Where did you first meet your boyfriend? ------It was in the department store ______ he worked.
I think you should go back to your ______ plan, which is much more practical than the present one.
The job is not very profitable ________ cash, but I can get valuable experience from it.
On hearing the news, the girl rushed out without hesitation, ______ the luggage ______ on the floor, and ______ in the dark.