问题描述：
[单选]
The quality of the fuel oil and lube oil（）， Im afraid．
A．has much to do with the operation of the engine and its life
B．have much to do with the operation of the engine and its life
C．has much doing with the operation of the engine and its life
D．have much doing with the operation of the engine and its life
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答案解析：无
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上一篇：（）， so they are widely used on board ship nowadays．
下一篇：The fuel injection system is very important， so any trouble of it will（）the operation of the main engine．
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