【推荐2】词性归类：
It sounds like an educational story.
                                A
Living in a foreign country is difficult for her.
                    B
Can you tell the meaning of this sign?
                         C
Some people worry that robots will take the place of humans in the future.
                       D                                     E
Mary is preparing for the coming exam.   
                           F
He fold the paper carefully.
                            G                                           
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