The government has promised to the matter and give the workers a satisfactory answer.
The young scientist has made such great achievements in his chosen field ______ nobody else can make.
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.