The event that allowed Collins to pursue her career dreams was
Soon before she finished college, the Air Force started training female pilots.
Explanation:
The space exploration program had been going on for a long time and the man had been to the moon before the NASA thought of training and sending women to the space too.
This changed by the time that Collins graduated which was lucky for her as if it did not happen she would have had to choose a career different from her dreams. 
She was chosen for the training program recently started after she graduated and then became one of the contenders for the mission. 
 
        
                    
             
        
        
        
Answer:
=students should enter the exam hall by 10 am
=students should bring admit card in order to give their exam paper
= no one is allowed to talk and should maintain silence in the exam hall
= student are not allowed to talk to the invigilator rudely
= students are not allowed to leave the hall before one hour
 
        
             
        
        
        
Answer:
Past perfect tense.
Explanation:
Supposing that the italicized verb is <u><em>had gone</em></u>, then the tense is past perfect tense. 
This past perfect tense is an action that has happened sometime in the past but before something new has happened. In the sentence, the word "gone" is the third form of the verb, thus making it a past tense. Then, the use of the word "had" which is the past tense form of the verb "to have" shows it is the "perfect" form of the verb.
Thus, the whole sentence "<em>Your sister had gone when we arrived.</em>" is in the  "past perfect tense". 
 
        
             
        
        
        
The following can be used <span>as a hook in the introduction of an informative essay:
</span>an analogy<span><span> -explanation of one thing in terms of another, comparison of two thing,the ways in which they are alike </span>are highlighted
a dictionary definition - the terms that are used in the essay can be defined with dictionary definitions 
an in-depth analysis</span><span> - examination of the components of the object of interest</span>
        
             
        
        
        
Go to sparknotes.com & search the name of your book, and it'll give you ALL the information you need!!