No fewer than fifty men were injured in the accident.
At least fifty men were injured in the accident. (I think this is better.)
I do not like such immoral movies.
I do not like such movies, because they are immoral.
Dealing in poultry has earned him great profits.
He has earned great profits through dealing in poultry. (Better)
I think the last sentence would be improved by using the active voice rather than the passive voice. You should, of course, have a period at the end of each of your sentences, but I haven't edited the sentences in your question because the absence of periods might have been intentional. Some of your questions have problems with syntax. The first sentence contains a common grammatical mistake, i.e., "less" instead of "fewer."