题目内容
The economist says he is optimistic that developed nations will remain ________ to improving the quality of life in Africa.
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Social workers are fully aware that some poorly paid jobs with no entry requirements tend to have high staff ________.
Several days had ________ before he finally made up his mind to apply for the position, only to find that it was already taken by someone else.
We need a president who understands the ________ of the challenges we face, and has the strength and experience to address them
According to a recent estimation, which may be optimistic, only 20 percent of job-seekers have had any sort of ________ training.
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