I’m afraid we’ll have to work extra hours, for there are still some problems .
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 key word in the sentence has been ______, so it doesn't make any sense to us.
The job is not very profitable ________ cash, but I can get valuable experience from it.