A pervasive negative attitude of the engineers toward projects funded by his company is the cause of the delay of signing the contract.
【正确答案】
D
【答案解析】本题中，pervasive的意思是“普遍深入的”。D项prevalent“普遍的”符合题意，如：The habit of travelling by aircraft is becoming more prevalent each year．(坐飞机旅行一年比一年普遍了。)perpetual“永久的”，pernicious“有害的”，preventive“预防的”都不正确。