题目内容
________ a man knows what is not to be done, will he succeed in doing what is to be done.
[ ]
A.What if
B.If only
C.As if
D.Only if
答案:D
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题目内容
________ a man knows what is not to be done, will he succeed in doing what is to be done.
A.What if
B.If only
C.As if
D.Only if