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From when did you started working in silent?
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Anonymous From when did you started working in silent?
No. That's not correct. You may mean one of the following.

Since when did you start working in silence?
How long have you been working in silence?

CJ
Comments  
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anonymous From when did you started working in silent?

Since when did you start working in silent?

anonymous
anonymous From when did you started working in silent?

Since when did you start working in silent? silence?

As shown.

CJ