-this key doesn't work at all -please try_some oil in the lockA to put B put C puttingD being put 答是C为什莫

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-thiskeydoesn''tworkatall-pleasetry_someoilinthelockAtoputBputCputtingDbeingput答是C为什莫-thiskeydoesn''tw

-this key doesn't work at all -please try_some oil in the lockA to put B put C puttingD being put 答是C为什莫
-this key doesn't work at all -please try_some oil in the lockA to put B put C puttingD being put 答是C为什莫

-this key doesn't work at all -please try_some oil in the lockA to put B put C puttingD being put 答是C为什莫
try 是动词,如果选B就有两个动词作谓语因此不能选
try to 是尽力的意思,而这里是要尝试不是尽力,因此不能选A(如果勉强在外国也能说通,在中国不行)
try doing是尝试的意思,而D是被动,这里是主动,而不是被put
选C表示试着放点油进去.

try to do sth