One can conclude from the passage that the main idea is __________. the possible threats that oil producing companies need to be aware of
whether it is worth refining oil or not
the importance of oil refineries
the formation, the process of oil refinement, and related environmental and safety concerns
the types of refineries and proper places for their construction
As mentioned in the passage, the underlined word ‘releases’ means __________. consists of B) includes
C) makes up D) emits
As mentioned in the passage, the underlined word ‘substantial’ means __________. artificial B) massive
C) rich D) difficult
People often ask which is the most difficult language to learn, and it is not easy to answer because there are many factors to take into consideration. People learn their mother tongue naturally, so the question of how hard a language is only suitable when learning a second language. No language is easy to learn well, but languages which are related to our first language, namely mother tongue, are easier to learn. Learning a completely different language is a huge challenge.
Some people seem to learn languages quickly, while others find it very difficult. Teachers and the conditions in which they learn the language also play an important role, as well as each learner’s motivation for learning. If people learn a language because they need to use it professionally, they often learn it faster than people studying a language that has no direct use in their daily life.