In the following passage, some words have been omitted. Read the passage carefully and choose the most appropriate option from the given alternatives to fill in each blank. Mark your answer for each question.
As technology continues to advance, space exploration is no longer limited to astronauts and scientists. In the coming decades, space could become a place for engineers, architects, doctors, and even artists. The idea of working beyond Earth, once considered science fiction, is slowly becoming a realistic (1)_____. Many countries have already started investing in training programs that prepare students for space-related fields. These programs not only focus on science, but also build problem-solving and leadership skills. Working in space will bring its own challenges-long durations, isolation, and technical failures will require (2)_____ preparation. Yet, the chance to be part of something bigger than oneself is what draws many young minds. With space tourism rising and private companies joining the race, the job market is expected to (3)_____. However, to succeed in this field, one must stay curious, adaptable, and (4)_____. In the future, reaching for the stars might not be a dream, but a (5)_____.
What would come in (4)
Show answer & explanation
Correct answer: A
Explanation
In the context of the passage, the sentence discusses the qualities necessary for success in the high-stakes field of space exploration.
The word reliable (meaning dependable or trustworthy) fits perfectly alongside "curious" and "adaptable" because professionals in space must be consistently precise and dependable to ensure safety and mission success.