Questions139~142 refer to the following article. 
This article tries to explain why some sectors are struggling to fill their employment __139__ while workers are doubtful to take up jobs in those sectors.
1.Wages: One of the most common __140__ workers might think they can do better elsewhere is the wage rates offered by the employers. If the pay offered by a particular sector is not competitive enough or does not match the workers' expectations, they might look for employment in other sectors that offer better compensation.2.Skill Mismatch: Sometimes, the skills __141__ for a job may not match the skills that workers possess. In such cases, workers might feel that they are not suited for the jobs available in that sector and may look for employment in other sectors where their skills are more aligned with the job requirements.3.Perception of the Sector: Workers might also be __142__ to take up jobs in certain sectors due to negative perceptions about the sector. For example, some workers might not be keen on working in the manufacturing sector because they perceive it to be a dirty or dangerous work environment. This perception can impact their willingness to work in that sector.
【題組】139.
(A)descriptions
(B)competitions
(C)technicians
(D)vacancies