Answer:
First parts only: Not accustomed to unit of math teachings
B: It's more effective to use colored chalk
C: Its difficult to memorize all of these relations
D: It's essential to distinguish the elements of the elements of a set from the "non-elements."
E: It's important to point out that elements of a set need be individual, but may themselves be sets.
F: It's impossible to determine the exact image in that case.
G: It's desirable to have a more simplified system of notation.
H: It's clear to see that the meaning of an expression depends on its context.
I: It's compulsory to give your full name.
J: It's necessary to do the measuring as accurately as possible. 
K: Its permissible to cut [=] into 2 or 3 parts.
It's impossible to read your writing.
It's useful to use a heating pad.
[-----]
It's silly to get upset over small things.
It's difficult to solve this equation.
It's important for your health to drink lots of liquids.
Its unfair to criticise him.
 
        
             
        
        
        
Answer:
Food deserts
should offer
transportation and
store variety.I think this
 
        
                    
             
        
        
        
Answer:
Nick will need to go back and relate the events that led up to that moment in the story.
 
        
             
        
        
        
Answer:
"How do plastic straws impact wildlife?" is the open-ended question.
Explanation:
<em>The other three options can be answered with few definitive answers, but asking how they impact wildlife allows the writer to answer with various responses.</em>
 
        
                    
             
        
        
        
1.anyone; 2. someone ; 3. some; 4. something; 5. nothing; 6. anything, someone; 7. something.