核心问题
Emphasis is laid on the necessity that all the objectives to be attained ____ (take) into account before starting a new project. (全国研考)
书上给的答案是 be taken 或 should be taken。这是为什么呢？
词典解答
如同 requirement, proposal, suggestion, plan, motion 等名词一样, 名词 necessity 也要求其同位语从句使用现在虚拟式 (be taken) 或 should + 动词原形 (英国英语), 见 requirement。
There is an absolute necessity that all the facts be examined/should be examined. 完全有必要对这些事实加以检验。