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一道英语句型转换题!George is going through the customs and security c

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一道英语句型转换题!
George is going through the customs and security check.He started to line up half an hour ago.(合并成一句) George _________ ______ linging up to go through the customs and security check for half an hour.We came here two hours ago to see the manager.(保持原句意思) We've been ___________ for the manager ___two hours.
一道英语句型转换题!George is going through the customs and security c
has been waiting fo