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An encouraging word to someone who is down can life him up a An encouraging word to someone who is down can lift them up Someone is singing now.Who （）it be?A.must B.should C.can D.w Someone is knocking at the door.Who can it be?的回答.A.Nothing If this book is not yours,( ) can it be?A,what else B,who el Listen!Someone is singing next door.Who ( ) it be?填can还是may? there is someone in the room,who can it be?请问这句子的someone能换成s ----Someone is at the door.----_______?A.what is it B.who is There's someone outside .Who ---it be A:must B:can C:shall D Someone is knocking at the door,but who can （ ）be.A one B he What is recycling?It is to reuse anything that can be used a 脑筋急转弯What is it that you can keep after gving it to someone