Fix the grammatical mistakes: The introducing of working-age immigrants also increased the competition in the workforce.
The following are the main reasons why the,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
The first two sentences of, 1998: 229, 230, 231.
The first sentence is a paraphrase of, 1998: 231, 232, 233.
The second sentence is a paraphrase of, 1998: 233, 234, 235.
The third sentence is a paraphrase of,