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fed, _____ ________?(改成反意疑問句) They have been here since 2020. (對劃線部分提問) ______ __________have they been here? The old man _________ last year. He _____ _______ _______ for a year. (die) (動詞填空) This factory opened twenty years ago.(同義句轉(zhuǎn)換 ) This factory ______ ______ ________ for twenty years. Miss Gao left an hour ago. ( 同義句轉(zhuǎn) 換) Miss Gao ________ _______ ________ ________ an hour ago. Her mother has been a Party member for three years .(同義句 Her mother ______