Answer:
There are four types of sentences: simple, compound, complex, and compound-complex. Each sentence is defined by the use of independent and dependent clauses, conjunctions, and subordinators. Simple sentences: A simple sentence is an independent clause with no conjunction or dependent clause.
Explanation:
 
        
             
        
        
        
It’s upside down and I can’t read it can you send it again so I can help you!
        
             
        
        
        
An adjective clause functions as an adjective, that is, it gives some information about a noun in a sentence (or a pronoun) ( information which is not an action). 
The noun modified here is "knife" and the information about the knife, that is the complete adjective clause is "<span> that his dad gave him.
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Answer:
At the Naval Surface Warfare Center outside of Washington D.C, a sophisticated indoor ocean that can recreate eight different open-water conditions is used to test models of  ships.
Explanation:
The subject-verb agreement, simply said, represents the grammar rule where subject and verb must agree in number, so if the subject is singular, the verb must also be in singular and vice versa - if the subject is plural, then the verb must be plural too.
In the given sentence we have the subject: <em>a sophisticated indoor ocean - </em>which is singular and we have the verb: <em>are</em> - which is plural, so they do not agree in number, so we have to change the number of the verb in order to have the subject-verb agreement completed. 
 
        
             
        
        
        
Answer
Athletes, band members, and yearbook staff all make LHS great, for they add to the culture of the school, making it better.
Explanation: Hope I helped!