Although they lost their jobs, saving and unemployment benefits allow the couple to ____ their comfortable

home. [ ]

A. come up with

B. catch up with

C. hold on to

D. look forward to

柴油机燃烧室零件发生高温腐蚀的条件除了燃用重油外，主要还有（）。

A．零件温度高

B．冷却不良

C．润滑不良

D．零件材料差