Explanation

You can maintain a healthy life, if you keep exercising.

Explanation

 Our home is built of bricks means ہمارا مکان اینٹوں سے بنا ہوا ہے

The bag is made of leather.

The window is made of glass. 

Explanation

If two nouns are joined by preposition, the noun on either side singular and the verb is also singular.

Explanation

India is hostile to her neighbours.

Hostile to means دشمن یا مخالف ہونا

Explanation

Here before means کے سامنے

He will appear before the judge means وہ جج کے سامنے پیش ہوگا

Explanation

A prepositional phrase is a group of words consisting of a preposition, its object, and any words that modify the object

Explanation

• Amjad, Ali & Ahmed will discuss the issue Among themselves.
• امجد علی اور احمد اس معاملے پر آپس میں بات کریں گے۔
• ***
• Among is a preposition. 
• Among is the best choice for completing the meaning of the original sentence
• ****
• 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

The word "attack" does not take any preposition.

The word attack is a verb which means کسی پر حملہ کرنا

Explanation

Across has two different meanings.

For Example: She has been waiting for me across the road.

For Example: A tree fell across the railway line that caused an accident

Explanation

Note:- If two verbs/adjectives etc take two different prepositions, we must use appropriate prepositions along with the verb/adjective.

Mr. Aslam is senior to and older than Mr. Sajad.