Ans 6:
Class : Class 4 
                                                                                                    
                                                                                                    dream means ambition and determination. Goal means success and aim. So dream is the correct answer.
                                                                                                
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Ans 8:
Class : Class 10 
                                                                                                    
                                                                                                    A. the childrens are, it is wrong because child is singular and children a plural, 'childrens' word does not exist. You can take help of google and it will too say that 'children word does not exist'.