Morgan Stanley analysts recently included this chart of crude production costs. Onshore Middle East oil sites are much cheaper to tap than North American shale, which costs about $65 per barrel to extract.
1. ponder-reflect deeply on a subject; I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate.
2. E: An imbroglio is a quarrel, often a complicated/entangled one. Harmony is the best antonym. Fight (A) is a synonym. Conclusion (B) is an end or a decision. Trust (C) is belief that someone is honest or dependable, or that something is true. Thankfulness (D) is gratitude. 3. B: To reminisce is to remember and/or relate or discuss memories. Its opposite is to forget. Ignore is the closest antonym here. To originate (A) is to begin. To create (C) is to make/produce. To reconvene (D) is to meet again, as a committee or group.