单项选择题

（）the knowledge, he didn't know how to ask the way.

A. Knowing not
B. Having not known
C. Not knowing
D. Not to know

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单项选择题
If I heard, I（）

A. would not be asking
B. will not ask
C. did not ask
D. wasn't be asking
单项选择题
（）could solve that problem. It's so easy.

A. Someone
B. None
C. No one
D. Anyone
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