She talks as if  she knew everything

She was exempted __to__ the fine.

Shihab is the tallest boy in the class   = Shihab is taller than any other boy in the class.

Shut the door. = Let the door be shut.

Silver lining=When things look black, there's always a silver lining.
The agency managed to find a silver lining in the flames.

Smile on (মৃদু হাসি দেওয়া) He had a huge smile on his face.

Smoke filled the room. (Passive) = The room was filled with smoke.

Smoke is emitted from the chimney.

Someone will walk her dog. (Passive) 

= Her dog will be walked.

Sovraign = Sovereign

Staff = Staffs

Stallion- Mare

Stand in the middle of the circle.  = Standing in the middle of a circle.

"A stone's throw" is an idiom that means a very short distance. For example, you might say "The apartment is just a stone's throw from the sea"

Contemporary