To get the ship back into full working order would ______ spending huge amounts of money and effort.

【正确答案】 D

【答案解析】 形近词辨析。elate“使兴高采烈，使得意”；elaborate“详细制定，详细阐述”；eject“驱逐，逐出”；entail“使……必要”。句中to引导的动词不定式是目的，后边的money and effort是采取的措施。故答案为D。