Explanation

 She died at 7 PM on 12th August.

We use preposition at before time. Like at 12 AM, at 7 PM, at 11 AM etc.

We use preposition on before a date. Like on 12th August, On 5th June, On 8th December etc.

Explanation

Between: ہے دو لوگوں کیلئے استعمال ہوتا

Among: دو سے زائد لوگوں کیلئے استعمال ہوتا ہے

There wasn’t much unity among the council members.

Explanation

Words like, morning, evening, midnight, June 2014, etc. are generally followed by the preposition Since. 

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Explanation

Some people eat their food with their fingers

Explanation

• the whole was behind the resident.
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• 'behind' preposition is used at or to the back of someone or something:
• ***
• Behind is best to keep the meaning of the original sentence
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• behind is a preposition of place so we use the "behind" preposition because they indicate the place
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• some Prepositions of place are  (in, on, at, next to, in front of, behind, under, etc.)
  

Explanation

• Amjad, Ali & Ahmed will discuss the issue Among themselves.
• امجد علی اور احمد اس معاملے پر آپس میں بات کریں گے۔
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• Among is a preposition. 
• Among is the best choice for completing the meaning of the original sentence
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• Among is used surrounded by someone or something; in the middle of someone or something
  
• Among is used when talking about people or things that are not distinct and are viewed as a group:
• There wasn't much unity among the council members.
• Among could indicate that something belongs to a group:
  

Explanation

With: کے ساتھ

For: کیلئے

Explanation

"Calamity آفت " means a great misfortune or disaster آفت

Explanation

Cascade جھرنا۔

Waterfall آبشار

Explanation

Consolidate means ساتھ لانے یا مضبوط/متحد بنانے کے لئے

Combine means ساتھ لانے یا مضبوط/متحد بنانے کے لئے