Corrections

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Text from Morron - English

"one" or "a"?
They propose to test one Control Panel.- They propose to test a Control Panel.- The current's speed is one knot.
Tre current's speed is a knot.
I have been there for one month and half.
I have been there for a month and half.

Title
- "one" or "a"?
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Sentence 1
- They propose to test one Control Panel.- They propose to test a Control Panel.- The current's speed is one knot.
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Sentence 2
- Tre current's speed is a knot.
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Sentence 3
- I have been there for one month and half.
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Sentence 4
- I have been there for a month and half.
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- ADD a NEW CORRECTION! - Sentence 4