This is a TED talk given by Karem Thompson
Explanation:
In her speech she talks about how fear is connected with the stories we had read. She says, first, we have to acknowledge that fear is an entire system of the brain. 
Yet today, when we do not have to fear a saber-toothed tiger behind every tree, we are still telling ourselves that a critical level of danger may be right around every corner.
Now our stress is social, ethical, and financial, but our brain elevates the challenges to that same fear center. We have difficult family situations that need attention, but we avoid wading in because we are imagining the worst possible outcome. 
 
        
             
        
        
        
The
batteries in our cell phones need to charge.
 
The verb
is singular since the noun used ‘batteries’ is plural.
 
<span>Verbs
are simply known as the ‘action’ words – may it be mental, physical or
mechanical. When verbs are paired with auxiliaries (helping verbs), they are
known as verb phrase. These helping verbs always go first before the actual
verb. <span>Perfect
tenses serves a portraying the verb or the action word as something that
already happened or is completed, thus the term ‘perfect’. If it is present
perfect tense, it means that the action was already done relatively to the
present (has/have with past participle). If it is past perfect tense, action is
already finished relatively to the past (had with past participle and if it is
future perfect tense, action is complete relatively to the future (will have
with past participle</span></span>
        
                    
             
        
        
        
Answer:
2. Knocking
"I can hear someone knocking on the door."
 
        
                    
             
        
        
        
Answer:
Healthcare and medicine
Arts and entertainment
Business
Industrial and manufacturing
Law enforcement and armed forces
Science and technology
Explanation:
 
        
             
        
        
        
Answer:
In her book, Nguyen discusses how she escaped from the Viet Cong, how she came to America, and  how she adjusted to American life.
Explanation:
how + subj. - verb - used consistently for all three clauses