Ai giúp mình câu 4 nhanh với ạ

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Giải thích các bước giải:

giúp mik với ạ, vote 5 sao + ctlhn cho bạn đầu tiên ạ (câu hỏi tiếng anh ngoài sách) He has been..........football trading cards for two years. My friend has been..............online for model cars. Ive been....................cinema tickets since I was six. She has been...............about collecting stamps. Class 5B have been....................... different collect (making,thinking,saving,researching,hoping,working,searching,saying,expanding,collecting)